Larus cachinnans in the Netherlands
(last update: June 01, 2022)
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| Coordinators: Albert de Jong Leon Kelder Roland-Jan Buijs Thijs Horst Merijn Loeve Mars Muusse |
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 Caspian Gull cachinnans 02P4 (now K.G) 5CY-11CY, 2018 - 2022, De Kreupel & Medemblik,
the Netherlands. Pictures: Leon Kelder, Merijn Loeve & Renate Visscher.Parent of "nest r02P4". |
 Caspian Gull cachinnans D|0 1CY-2CY, May 2021 & January 2022, De Kreupel, the Netherlands & Sonzay, France. Picture: Leon Kelder & Patrick Derrien.Bird hatched at "nest w-201:U 21" in season 2021. |
 Caspian Gull cachinnans F0 1CY, May 14 2021, De Kreupel nest KK 21, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KK 21" in season 2021. |
 Caspian Gull cachinnans 0.0 1CY, May 13 2022, De Kreupel, the Netherlands.Bird hatched at "nest D09-22" in season 2022. |
 Herring Gull argenteus-type B.0 1CY, May 28 2021, De Kreupel - C, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KJ 21" in season 2021. |
 Caspian Gull cachinnans PESV 10CY-11CY, 2020-2021, Lelystad, the Netherlands.Parent of "nest 006" in season 2019-2021. Originally, ringed as pullus in Poland. |
 Caspian Gull cachinnans D|2 1CY, May & September 2021, De Kreupel, the Netherlands & offshore Gulf of Biskay / Bask Country. Picture: Asier Aldalur & Leon Kelder. Bird hatched at "nest L06 21" in season 2021. |
Caspian Gull cachinnans F1 1CY, May 21 2020, De Kreupel, the Netherlands. Bird hatched at "nest K05" in season 2020. |
 Caspian Gull cachinnans B.2 2CY, April 01 2022, Bañugues - Asturias, Spain. Picture: José Antonio Cañizares.Bird hatched at "nest w-201:U 21" in season 2021. |
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 Caspian Gull cachinnans PHSV (now C.G) 11CY-12CY, 2021-2022, Lelystad, the Netherlands.Parent of "nest PHSV" in season 2021-2022. Originally, ringed as pullus in Poland. |
 Caspian Gull cachinnans D|3 1CY, July 23 2021, Cley (Marshes), Norfolk, UK. Picture: Ashley Saunders.Bird hatched at "nest L06 21" in season 2021. |
 Caspian Gull cachinnans F2 1CY, May 21 2020, De Kreupel, the Netherlands.Bird hatched at "nest K03" in season 2020. |
 Caspian Gull cachinnans B.3 1CY, May - November 2021, the Netherlands, Dorset, UK & Asturias, Spain. Picture: Gilberto Sánchez Jardón, Martin Casemore & Leon Kelder. Bird hatched at "nest H01 21" in season 2021. |
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 Caspian Gull cachinnans PLDP 9CY, May 07 2020, Lelystad, the Netherlands.Parent of "nest 005" in season 2019 and 2020. Originally, ringed as pullus in Poland. |
 Caspian Gull cachinnans D|4 1CY, May 20 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest L06 21" in season 2021. |
 Caspian Gull cachinnans F3 1CY, June 12 2020, De Kreupel, the Netherlands.Bird hatched at "nest K03" in season 2020. |
 Caspian Gull cachinnans B.4 1CY, May 28 2021, De Kreupel - H, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest H01 21" in season 2021. |
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 Caspian Gull cachinnans PNED 8CY-9CY, 2020-2021, Lelystad, the Netherlands. Picture: Mars Muusse.Parent of "nest 002" in season 2019-2021. Originally, ringed as pullus in Poland. |
 Caspian Gull cachinnans D|9 1CY, May 20-30 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KD 21" in season 2021. |
 Caspian Gull cachinnans F4 1CY-3CY, May - June 2020, February 2021 & August 2022, De Kreupel & Almere,
the Netherlands. Picture: Eric Roeland, Leon Kelder & Thijs Horst.Bird hatched at "nest K03" in season 2020. |
 Caspian Gull cachinnans 0.9 1CY, September 03 2022, Kilnsea Wetlands, England. Picture: Andy Deighton.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.5 1CY-2CY, May 2021 & November-December 2022, the Netherlands. Picture: Eric Roeland, Ewout Huibers & Leon Kelder. Bird hatched at "nest H01 21" in season 2021. |
 Caspian Gull cachinnans P:A02 5CY, March - June 2021, Lelystad, the Netherlands. Picture: Mars Muusse & Albert de Jong.Parent of "nest 057" in season 2021. Originally, ringed as pullus in Poland. |
 Caspian Gull cachinnans D|+ 1CY, May & October 2021, De Kreupel & Schellinkhout, the Netherlands. Picture: Leon Kelder.Bird hatched at "nest KA 21" in season 2021. |
 Caspian Gull cachinnans F5 1CY-2CY, May 2020 & May 2021, De Kreupel & Almere,
the Netherlands. Picture: Leon Kelder & Eric Roeland.Bird hatched at "nest K02" in season 2020. |
 Caspian Gull cachinnans 0.F adult, February 25 2023, Almere, the Netherlands. Picture: Eric Roeland.Bird breeding at De Kreupel, trapped in season 2022. |
 Caspian Gull cachinnans B.6 1CY, May 30 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KD 21" in season 2021. |
 Caspian Gull cachinnans P:U60 4CY, March - June 2021, Lelystad, the Netherlands. Picture: Mars Muusse & Albert de Jong.Parent of "nest 068" in season 2021. Originally, ringed as pullus in Poland. |
 Caspian Gull cachinnans D|A 1CY-3CY, May 2021 - February 2023, De Kreupel - Almere, the Netherlands. Picture: Eric Roeland, Leon Kelder, Merijn Loeve & Thijs Horst. Bird hatched at "nest M01 21" in season 2021. |
 Caspian Gull cachinnans F7 1CY & 3CY, May - June 2020 & May 2022, De Kreupel & Medemblik,
the Netherlands. Picture: Leon Kelder.Bird hatched at "nest K04" in season 2020. |
 Caspian Gull cachinnans 0.R 1CY, May 13 2022, De Kreupel, the Netherlands.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.7 1CY, June 11 2021, De Kreupel nest A01 21, the Netherlands. Picture: Leon Kelder.Bird hatched at "nest A01 21" in season 2021. |
 Caspian Gull cachinnans XLDT adult, May 07 2020, Lelystad, the Netherlands.Parent of "nest 008" in season 2019 and 2020. Originally, ringed as pullus in Germany. |
 Caspian Gull cachinnans D|B 1CY, May - June 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest M04 21" in season 2021. |
 Caspian Gull cachinnans F8 1CY & 3CY, May - June 2020 & May 2022, De Kreupel,
the Netherlands. Picture: Leon Kelder.Bird hatched at "nest K04" in season 2020. |
 Caspian Gull cachinnans 0.S 1CY-2CY, July 2022 - January 2023, the Netherlands & England. Picture: Jeroen van Assema & Gerard Lax.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.8 1CY-2CY, June 2021 & October 2022, the Netherlands & England. Picture: Leon Kelder & Martin Casemore. Bird hatched at "nest A01 21" in season 2021. |
 Caspian Gull cachinnans XLHD 5CY-6CY, April-June 2020 & 2021, De Kreupel - B,
the Netherlands. Picture: Leon Kelder.As 4CY, it visited the native colony in Germany in the breeding season, however, as 5CY it started breeding in Holland. Parent of "nest XLHD 21". |
 Caspian Gull cachinnans D|C 1CY, May - June 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest M04 21" in season 2021. |
 Caspian Gull cachinnans F9 1CY-3CY, May 2020 - January 2022,
the Netherlands & France. Picture: Leon Kelder, Eric Roeland & Sophie Damian-Picollet.Bird hatched at "nest K07" in season 2020. |
 Hybrid Caspian Gull cachinnans 0.U 1CY, May - October 2022, De Kreupel, Almere & Wassenaarseslag, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.A 1CY, June 11 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest L07 21" in season 2021. |
 Caspian Gull cachinnans X56A 5CY-6CY, April 2022 - February 2023, Lelystad & Lelystad, the Netherlands. Picture: Eric Roeland, Thijs Horst & Mars Muusse.From east Germany, breeding in 2022 at Lelystad at "nest 206". |
 Caspian Gull cachinnans D|E 1CY, June 17 2021, De Kreupel nest KG 21, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest r-02P4 / KG 21" in season 2021. |
 Caspian Gull cachinnans F+ 1CY-2CY, May - June 2020 & October 2021, De Kreupel & Texel, the Netherlands. Picture: Willem Wind & Leon Kelder.Bird hatched at "nest K06" in season 2020. |
 Hybrid Herring Gull argenteus 0.V 2CY, March 03 2023, Almere - De Vaart, the Netherlands. Picture: Eric Roeland.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.B 1CY, June & November 2021, De Kreupel & Spakenburg, the Netherlands. Picture: Leon Kelder & Hans van Muiswinkel. Bird hatched at "nest L07 21" in season 2021. |
 Caspian Gull cachinnans X60J 4CY, April - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse. From east Germany, prospecting in 2022 at Lelystad. |
 Caspian Gull cachinnans D|G 1CY, June & August 2021, De Kreupel, the Netherlands & St. Mary's Island, UK. Picture: John Malloy & Leon Kelder. Bird hatched at "nest r-02P4 / KG 21" in season 2021. |
 Caspian Gull cachinnans F= 1CY, May 21 2020, De Kreupel, the Netherlands.Bird hatched at "nest K05" in season 2020. |
 Caspian Gull cachinnans 0.W 1CY, July 01 2022, De Kreupel, the Netherlands. Picture: Jeroen van Assema.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.C 1CY, June - August 28 2021, De Kreupel - Q, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest Q01 21" in season 2021. |
 Caspian Gull cachinnans X540 5CY, April - June 2022, Lelystad, the Netherlands. Picture: Mars Muusse. From east Germany, breeding in 2022 at Lelystad at "nest 223". |
 Caspian Gull cachinnans D|N 1CY, May - June 2021, De Kreupel - C, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest C03 21" in season 2021. |
 Caspian Gull cachinnans FA 1CY, June 12 2020, De Kreupel, the Netherlands.Bird hatched at "nest K08" in season 2020. |
 Caspian Gull cachinnans 0.X 1CY, July 26 2022, Cromer, England. Picture: Andy Hale.Bird hatched at De Kreupel in season 2022. |
 Herring Gull argenteus B.L 2CY-3CY, December 2022 - February 2023, Almere, the Netherlands. Picture: Eric Roeland.Bird hatched at colony De Kreupel, in season 2021. |
 Caspian Gull cachinnans X804 adult, immigrant from east Germany, breeding in 2020 at De Kreupel colony, labelled "nest K06". Originally, ringed as pullus in Germany. |
 Caspian Gull cachinnans D|P 1CY, May - June 2021, De Kreupel - C, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest C03 21" in season 2021. |
 Caspian Gull cachinnans FB 1CY, June 2020 & April 2022, De Kreupel & Almere,
the Netherlands. Picture: Leon Kelder & Eric Roeland.Bird hatched at "nest K08" in season 2020. |
 Caspian Gull cachinnans 0.Y 1CY-2CY, May 2022 - January 2023, the Netherlands & England. Picture: Jeroen van Assema, David Morrisson & Richard Bonser.Bird hatched at De Kreupel in season 2022. |
 Herring Gull argenteus B.N 1CY-3CY, November 2021 - March 2023, Almere & Bunschoten-Spakenburg, the Netherlands. Picture: Thijs Horst, Mars Muusse, Eric Roeland & Hans van Muiswinkel.Bird hatched at colony De Kreupel, in season 2021. |
 Caspian Gull cachinnans hybrid XCHP 5CY, April - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.From east Germany, breeding in 2022 at Lelystad at "nest XCHP". |
 Caspian Gull cachinnans D|S 1CY, May - June 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest D08 21" in season 2021. |
 Caspian Gull cachinnans FD 1CY, June 12 2020, De Kreupel, the Netherlands.Bird hatched at "nest K09" in season 2020. |
 Caspian Gull cachinnans 1.B 1CY, August 15 2022, Manchester, England. Picture: Rob Creek.Bird hatched at De Kreupel in season 2022. |
 Herring Gull argenteus B.P 1CY, July 30 2021, De Kreupel, the Netherlands. Picture: Leon Kelder. Bird hatched at colony De Kreupel, in season 2021. |
 Caspian Gull cachinnans 201:U 6CY, May 20 2021, De Kreupel - D,
the Netherlands. Picture: camera trap. Parent of "nest 201U 21" in season 2021. Originally, ringed as pullus in Czechia. |
 Caspian Gull cachinnans D|T 1CY, May 20 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest D08 21" in season 2021. |
 Caspian Gull cachinnans FE 1CY, June 12 2020, De Kreupel, the Netherlands.Bird hatched at "nest K09" in season 2020. |
 Caspian Gull cachinnans 1.M 1CY, July - August 2022, Cotesbach & Isles of Scilly, England. Picture: Dale Green & Robert Flood.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.R 2CY, March, July & November 2022, France & the Netherlands. Picture: Julien Yvon, Eric Roeland & Mars Muusse.Bird hatched at colony De Kreupel, in season 2021. |
 Caspian Gull cachinnans 327:U 4CY-5CY female, March 2021 - July 2022, Lelystad, the Netherlands. Picture: Albert de Jong, Mars Muusse & Thijs Horst. Ringed as pullus in Czechia. Present in 2021 & 2022 (with partner r-KY27 from Belarus), but no breeding. |
 Caspian Gull cachinnans D|U 1CY, May - June 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest D08 21" in season 2021. |
 Caspian Gull cachinnans FF 1CY, June 12 2020, De Kreupel, the Netherlands.Bird (maybe?) hatched at "nest K09" in season 2020. |
 Caspian Gull cachinnans 1.S 1CY, July - September 2022, Sheffield, England. Picture: J. Hewitt & Andy Deighton.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans B.= adult, July 17 2022, Lelystad,
the Netherlands. Pictures: Thijs Horst & Mars Muusse.Bird breeding at De Kreupel in season 2022. |
 Caspian Gull cachinnans KY27 adult male, May 2021 & April 2022, Minsk, Belarus & Lelystad, the Netherlands. Picture: Irina Samusenko & Mars Muusse. Ringed as breeding adult male in season 2021 in Belarus. In 2022 with partner w-327:U from Czechia. |
 Caspian Gull cachinnans D|V 1CY, May - June 2021, De Kreupel - E, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest E01 21" in season 2021. |
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 Caspian Gull cachinnans 1.U 1CY, October 26 2022, Westkapelle, the Netherlands. Picture: Egbert Vrieling.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.A 1CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 60" in season 2022. |
 Caspian Gull cachinnans NLA 5.517.117 3CY & 5CY, July 2020 & April 2022, De Kreupel - C, the Netherlands. Picture: Leon Kelder & Merijn Loeve. This is the first record of a Dutch bird back in the native colony, in fact, returning to the exact island where it was ringed as pullus. |
 Caspian Gull cachinnans F|0 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong & Mars Muusse. Bird hatched at "nest 60" in season 2021. |
 Caspian Gull cachinnans FH 1CY, June 12 2020, De Kreupel, the Netherlands.Bird hatched at "nest K09" in season 2020. |
 Caspian Gull cachinnans 1.V 2CY, January 30 2023, Cuves - Manche, France. Picture: Sébastien Provost.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.B 1CY, May - December 2022, the Netherlands & Spain. Picture: Mars Muusse & Carlos Andrés.Bird hatched at "nest 60" in season 2022. |
 Herring Gull argenteus NLA 5.556.763 1CY, May 20 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KC 21" in season 2021. |
 Hybrid Herring Gull argenteus x Caspian Gull cachinnans F|1 1CY, May & October 2021, Lelystad, & Barneveld dump, the Netherlands. Picture: Timon van den Heuvel, Albert de Jong & Mars Muusse. Bird hatched at "nest 60" in season 2021. |
 Herring Gull argentatus hybrid FJ 1CY, May 14 2021, De Kreupel, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest XLHD 21" in season 2021. |
 Caspian Gull cachinnans 2.2 1CY-2CY, August 2022 & February 2023, De Kreupel & Almere, the Netherlands. Picture: Leon Kelder & Eric Roeland.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.C 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 60" in season 2022. |
 Caspian Gull cachinnans F|0 1CY-2CY, May 2020 & August 2021, Lelystad & Schellinkhout, the Netherlands. Picture: Merijn Loeve & Leon Kelder.Bird hatched at "nest 09" in season 2020. |
 Herring Gull argenteus F|2 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong. Bird hatched at dam 1 south section near "nest 60-62-63" in season 2021. |
 Lesser Black-backed Gull graellsii FK 3CY, August 16-23 2022, Almere, the Netherlands. Picture: Thijs Horst, Mars Muusse & Eric Roeland.Bird hatched at De Kreupel in season 2021. |
 Caspian Gull cachinnans 2.3 1CY, July 01 2022, De Kreupel, the Netherlands. Picture: Jeroen van Assema.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.D 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest PNED" in season 2022. |
 Caspian Gull cachinnans F|1 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 06 yPESV" in season 2020, one of the parents being Caspian Gull Larus cachinnans PESV 10CY originally from Poland. |
 Herring Gull argenteus F|4 1CY-2CY, May 2021 - August 2022, the Netherlands. Picture Walther Leers, Eric Roeland, Hans van Muiswinkel, Thijs Horst & Albert de Jong.Bird hatched at dam 1 south section near "nest 60-62-63" in season 2021. |
 Caspian Gull cachinnans FL 1CY, May 14 2021, De Kreupel - C, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest C04 21" in season 2021. |
 Caspian Gull cachinnans 2.4 1CY, July 01 2022, De Kreupel, the Netherlands. Picture: Jeroen van Assema.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.F 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 112" in season 2022. |
 Caspian Gull cachinnans F|2 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 21" in season 2020. |
 Caspian Gull cachinnans F|5 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong. Bird hatched at nest PLDP in season 2021. |
 Caspian Gull cachinnans FM 1CY-2CY, May 2021 & July 2022, De Kreupel & Almere, the Netherlands. Picture: Leon Kelder & Eric Roeland.Bird hatched at "nest C04 21" in season 2021. |
 Caspian Gull cachinnans 2.8 1CY-2CY, November 2022 - January 2023, Katwijk & Bunschoten, the Netherlands. Picture: Mars Muusse & Hans van Muiswinkel.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.H 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 111" in season 2022. |
 Caspian Gull cachinnans F|4 1CY, May & September-December 2020, the Netherlands & England. Picture: Merijn Loeve & Andy Hale.Bird hatched at "nest 21" in season 2020. |
 Hybrid Herring Gull argenteus x Caspian Gull cachinnans F|6 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong, Roland-Jan Buijs & Mars Muusse. Bird hatched at "nest 40" in season 2021. Father is Caspian Gull and mother is Herring Gull. |
 Caspian Gull cachinnans FN 1CY, May 14 2021, De Kreupel nest KK 21, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KK 21" in season 2021. |
 Caspian Gull cachinnans 2.F 1CY, August 23 2022, Guernsey, England. Picture: Wayne Turner.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.J 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 111" in season 2022. |
 Caspian Gull cachinnans F|5 1CY, May & September 2020, the Netherlands & Portugal. Picture: Merijn Loeve, Rui Viana & Helder Cardoso.Bird hatched at "nest 33" in season 2020. |
Hybrid Herring Gull argenteus x Caspian Gull cachinnans F|7 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong, Roland-Jan Buijs & Mars Muusse. Bird hatched at "nest 40" in season 2021. Father is Caspian Gull and mother is Herring Gull. |
 Caspian Gull cachinnans hybrid FP 1CY-2CY, May 2021 & February 2022, De Kreupel & Medemblik, the Netherlands. Picture: Leon Kelder & Mars Muusse. Bird hatched at "nest KK 21" in season 2021. |
 Caspian Gull cachinnans 2.L 1CY, November 08 2022, Dungeness, England. Picture: Martin Casemore. Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.K 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 207" in season 2022. |
 Caspian Gull cachinnans F|6 1CY-3CY, May 2020 - April 2022, Lelystad-Almere, the Netherlands. Picture: Merijn Loeve, Mars Muusse & Eric Roeland. Bird hatched at "nest 33" in season 2020. |
 Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|8 1CY, May & October 2021, Lelystad-Almere, the Netherlands. Picture: Eric Roeland, Albert de Jong & Thijs Horst. Bird hatched at "nest 34" in season 2021. Father is Caspian Gull and mother is Herring Gull. |
 Caspian Gull cachinnans FR 1CY-2CY, May 2021 - April 2022, De Kreupel & Almere, the Netherlands. Picture: Leon Kelder & Mars Muusse. Bird hatched at "nest C06 21" in season 2021. |
 Caspian Gull cachinnans 2.U 1CY, July 01 2022, De Kreupel, the Netherlands. Picture: Jeroen van Assema.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.L 1CY, May - October 2022, the Netherlands & Denmark. Picture: Lasse Nabe-Nielsen, Mars Muusse & Thijs Horst. Bird hatched at "nest 12" in season 2022. Found dead October 2022. |
 Caspian Gull cachinnans F|7 1CY, May, August & October 2020, Lelystad & Dordtse Biesbosch, the Netherlands. Picture: Merijn Loeve, Eric Roeland & Jos Koopman. Bird hatched at "nest 06" in season 2020, one of the parents is Caspian Gull Larus cachinnans PESV 10CY originally from Poland. |
 Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|9 1CY-2CY, May 2021 - June 2022, Lelystad, the Netherlands. Picture: Eric Roeland, Mars Muusse & Albert de Jong.Bird hatched at "nest 34" in season 2021. Father is Caspian Gull and mother is Herring Gull. |
 Caspian Gull cachinnans FS 1CY, May -June 2021, De Kreupel - C, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest C06 21" in season 2021. |
 Caspian Gull cachinnans 2.W 1CY, July 24 2022, Wieringerwerf, the Netherlands. Picture: Robert Schouw.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.M 1CY-2CY, May 2022 - February 2023, Lelystad & Markerwadden, the Netherlands. Picture: Maarten Hotting, Mars Muusse & Thijs Horst. Bird hatched at "nest 12" in season 2022. |
sm.jpg) Caspian Gull cachinnans F|8 1CY-4CY, May 2020 - March 2023, Lelystad & Almere, the Netherlands. Picture: Merijn Loeve, Thijs Horst & Eric Roeland. Bird hatched at "nest 11" in season 2020. |
 Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|+ 1CY-2CY, May 2021 - January 2022, Almere-Lelystad, the Netherlands.Bird hatched at "nest 34" in season 2021. Father is Caspian Gull and mother is Herring Gull. |
 Caspian Gull cachinnans FT 1CY-2CY, May 2021 - April 2022, De Kreupel & Almere, the Netherlands & Gijón, Spain. Picture: César Fernández González, Eric Roeland, Thijs Horst & Leon Kelder. Bird hatched at "nest C06 21" in season 2021. |
 Caspian Gull cachinnans 3.4 2CY, Gueltas - Morbihan, France. Picture: Philippe Dubois.Bird hatched at island C - De Kreupel in season 2022. |
 Caspian Gull cachinnans C.N 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 12" in season 2022. |
 Caspian Gull cachinnans F|9 1CY-2CY, May 2020 & December 2021, Lelystad & Westkapelle, the Netherlands. Picture: Merijn Loeve & Ezra Mandemaker.Bird hatched at "nest 11" in season 2020. |
 Hybrid Caspian Gull cachinnans F|= 1CY-2CY, May 2021 - December 2022, the Netherlands & U.K.Bird hatched at "nest 53" in season 2021. |
 Caspian Gull cachinnans FU 1CY, May & December 2021, De Kreupel, the Netherlands & Peniche, Portugal. Picture: Leon Kelder & Helder Cardoso.Bird hatched at "nest D02 21" in season 2021. |
 Caspian Gull cachinnans 3.A 1CY, July 28 2022, Cromer, England. Picture: Andy Hale.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.P 1CY-2CY, May 2022 - March 2023, Lelystad & Almere, the Netherlands. Picture: Mars Muusse & Thijs Horst. Bird hatched at "nest 227" in season 2022. |
 Caspian Gull cachinnans F|= 1CY-4CY, May 2020 - February 2023, Lelystad & Almere, the Netherlands. Picture: Merijn Loeve, Rene Oosterhuis, Mars Muusse & Eric Roeland. Bird hatched at "nest 14" in season 2020. |
 Caspian Gull cachinnans F|A 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 25" in season 2020. |
 Caspian Gull cachinnans FV 1CY, May & November 2021, the Netherlands & Spain. Picture: Leon Kelder, Salva Garcia, & Stef Strik. Bird hatched at "nest D02 21" in season 2021. |
 Caspian Gull cachinnans 3.K 1CY, August 16 2022, Onderdijk, the Netherlands. Picture: Theo Ruppert.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.R 1CY, May - September 2022, the Netherlands & England. Picture: Ian Bartlett, Brian Small Jeff Higgott & Mars Muusse.Bird hatched at "nest 227" in season 2022. |
 Caspian Gull cachinnans F|+ 1CY-2CY, May 2020 - July 2021, Lelystad & Almere, the Netherlands. Picture: Juriaan Rung, Merijn Loeve & Eric Roeland. Bird hatched at "nest 14" in season 2020. |
 Caspian Gull cachinnans F|B 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 25" in season 2020. |
 Caspian Gull cachinnans FW 1CY, May 14 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest D02 21" in season 2021. |
 Lesser Black-backed Gull graellsii 3.R 1CY, September 09 2022, Ayamonte, Spain. Picture: David Cerezo.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.S 4CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird breeding at "nest r[C.S] / 108" in season 2022. |
 Caspian Gull cachinnans F|B 1CY, May 16 2019. Hatched in "nest 002" in season 2019. |
 Caspian Gull cachinnans F|C 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 17" in season 2020. |
 Caspian Gull cachinnans (hybrid) FX 1CY, November 11 2022, Noordwijk - Langevelderslag, the Netherlands. Picture: Mars Muusse.Bird hatched at De Kreupel in season 2020. |
 Caspian Gull cachinnans 3.T 1CY, November 11 2022, Tanholt Cambridgeshire, England. Picture: Josh Jones.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.T 1CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 14" in season 2022. |
 Caspian Gull cachinnans F|C 1CY - 4CY, May & October 2019, February 2021 & April 2022, the Netherlands. Picture: Merijn Loeve, Fred Visscher & Leon Kelder. Hatched in "nest 002" in season 2019, one parent is y-PNED. In 2022 breeding at De Kreupel. |
 Caspian Gull cachinnans F|D 1CY-2CY, May 2020 & May - July 2021, the Netherlands & July 2020, Suffolk, UK. Picture: Merijn Loeve, Brian Small, Eric Roeland, Naomi Huijg & Thijs Horst.Bird hatched at "nest 32" in season 2020. |
 Herring Gull argenteus FZ 2CY-4CY, March 2021 - February 2023, Almere, the Netherlands. Picture: Eric Roeland.Bird hatched at De Kreupel in season 2020. |
 Herring Gull argenteus 3.V 1CY, November - December 2022, Katwijk, the Netherlands. Picture: Mars Muusse.Bird hatched at De Kreupel in season 2022. |
 CaspianGull cachinnans C.U 1CY, May - October 2022, Lelystad & Almere, the Netherlands. Picture: Thijs Horst, Mars Muusse & Eric Roeland.Bird hatched at "nest 14" in season 2022. |
 Lesser Black-backed Gull graellsii F|D 1CY & 4CY, May 2019 & April 2022, Lelystad & Almere, the Netherlands. Picture: Merijn Loeve, Mars Muusse & Eric Roeland.Bird hatched at "nest A2019" in season 2019. |
 Caspian Gull cachinnans F|E 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 31" in season 2020. |
 Herring Gull argenteus 3.Y 1CY, August 19 2022, Southwold, England. Picture: Brian Small.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.V 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 17B" in season 2022. |
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 Lesser Black-backed Gull graellsii F|E 1CY, May 16 2019, Lelystad, the Netherlands. Picture: Merijn Loeve. Bird hatched at "nest A2019" in season 2019. |
 Caspian Gull cachinnans F|F 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 37" in season 2020. |
 Caspian Gull cachinnans 4.B 1CY, August 23 2022, Kilnsea, England. Picture: Peter Knight.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.W 1CY, May - November 2022, Lelystad, Almere & Spakenburg, the Netherlands. Picture: Hans van Muiswinkel, Thijs Horst & Mars Muusse.Bird hatched at "nest 17B" in season 2022. |
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 Caspian Gull cachinnans F|G 1CY, August 01 2019, Lelystad,
The Netherlands. Picture: Merijn Loeve. Bird hatched at "nest B2019" in season 2019. |
 Caspian Gull cachinnans F|G 1CY, May - September 2020, Lelystad & Westkapelle, the Netherlands. Picture: Merijn Loeve & Tim Raats. Bird hatched at "nest 38" in season 2020. |
 Hybrid? Caspian Gull cachinnans 4.M 1CY, July 16 2022, Wervershoof, the Netherlands.Bird hatched at De Kreupel in season 2022. |
 Caspian Gull cachinnans C.X 1CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 17" in season 2022. |
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 Caspian Gull cachinnans F|L 2CY, April & August 2020, Lelystad, the Netherlands. Picture: Eric Roeland.Bird hatched at "nest 008" in season 2019. |
 Caspian Gull cachinnans F|H 1CY-2CY, May 2020 & October 2021, Lelystad & Almere, the Netherlands. Picture: Merijn Loeve & Eric Roeland. Bird hatched at "nest 38" in season 2020. |
 Caspian Gull cachinnans 4.R 1CY, August 06 2022, Trintelzand, the Netherlands. Picture: Mars Muusse.Bird hatched at De Kreupel in season 2022. Road kill. |
 Herring Gull argenteus F.0 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at dam 1 near nest y[PNED] in season 2022. |
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 Hybrid (?) Caspian Gull cachinnans F|N 2CY-4CY, July 2020 & March - April 2022, Lelystad, Almere & Trintelzand, the Netherlands. Picture: Eric Roeland, Mars Muusse & Daniel Beuker.Bird hatched at "nest F2019" in season 2019. |
 Caspian Gull cachinnans F|J 1CY, May & August 2021, Lelystad & Almere, the Netherlands. Picture: Eric Roeland, Albert de Jong & Mars Muusse. Bird hatched at "nest 38" in season 2021. |
 Herring Gull argenteus F.1 1CY-2CY, June 2021 - January 2022, Almere & Lelystad, the Netherlands. Picture: Thijs Horst, Eric Roeland & Mars Muusse. Bird hatched at colony Lelystad - dam 1, in season 2021. |
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 Caspian Gull cachinnans "nest F2019" in season 2019. Two chicks ringed: F|N and F|P. |
 Caspian Gull cachinnans F|K 1CY, May - June 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at "nest 38" in season 2021. |
 Caspian Gull cachinnans hybrid 5.0 1CY, May - December 2022, Lelystad, the Netherlands & Santoña, Spain. Picture: Thijs Horst, Mars Muusse & Rubén Piculo.Bird hatched at "nest 221 / y[XCHP]" in season 2022. |
 Herring Gull argenteus F.2 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 near nest 61, in season 2021. |
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 Caspian Gull cachinnans F|R 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 03" in season 2020. |
 Caspian Gull cachinnans F|L 1CY-2CY, May 2021 - February 2022, the Netherlands & Portugal. Picture: Mónika Ballmann, Rui Ferreira & Susana Bilber, Joao Lima.Bird hatched at "nest 46" in season 2021. |
 Caspian Gull cachinnans hybrid 5.1 1CY, May - August 2022, Lauwersoog, Lelystad & Almere, the Netherlands. Picture: Dick Kuipers, Thijs Horst & Mars Muusse.Bird hatched at "nest 221 / y[XCHP]" in season 2022. |
 Caspian Gull cachinnans F.3 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at "nest r-FC_43", in season 2021. |
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 Caspian Gull cachinnans F|S 1CY-2CY, May 2020 - March 2021, Lelystad & Almere,
the Netherlands. Picture: Merijn Loeve, Eric Roeland & Mars Muusse.Bird hatched at "nest 03" in season 2020. |
 Caspian Gull cachinnans F|M 1CY-2CY, May 2021 - July 2022, the Netherlands & Belgium. Picture: Albert de Jong, Thijs Horst, Maurice Segers & Niels van Pelt. Bird hatched at "nest 15" in season 2021. |
 Caspian Gull cachinnans 5.2 1CY, May - September 2022, Lelystad & Hoek van Holland, the Netherlands. Picture: Thijs Horst, Mars Muusse & Johnny de Zeeuw.Bird hatched at "nest 14" in season 2022. |
 Caspian Gull cachinnans F.4 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at "nest r-FC_43", in season 2021. |
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 Caspian Gull cachinnans F|T 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 03" in season 2020. |
 Caspian Gull cachinnans F|N 1CY, May 2021 - December 2022, the Netherlands, Belgium & Spain. Picture: Albert de Jong, Roland-Jan Buijs, David Fernandez & Juan Ruiz.Bird hatched at "nest 15" in season 2021. |
 Caspian Gull cachinnans 5.3 1CY, May - December 2022, the Netherlands & England. Picture: Thijs Horst, Mars Muusse, Andy Deighton & Rob Creek.Bird hatched at "nest 206 / y[X56A]" in season 2022. |
 Caspian Gull cachinnans F.A 1CY, May & August 2021, Lelystad-Almere, the Netherlands. Picture: Albert de Jong & Eric Roeland.Bird hatched at "nest 053", in season 2021. |
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 Caspian Gull cachinnans F|U 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 29" in season 2020. |
 Caspian Gull cachinnans F|P 1CY, October 23-30 2021, Almere, the Netherlands. Picture: Eric Roeland.Bird hatched at "nest 13" in season 2021. |
 Caspian Gull cachinnans 5.4 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 206 / y[X56A]" in season 2022. |
 Caspian Gull cachinnans F.B adult, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong, Roland-Jan Buijs & Mars Muusse. Parent of "nest r-FB_61", in season 2021. |
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 Caspian Gull cachinnans F|V 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 35" in season 2020. |
 Caspian Gull cachinnans F|R 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong & Mars Muusse. Bird hatched at "nest 13" in season 2021. |
 Caspian Gull cachinnans 5.5 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 206 / y[X56A]" in season 2022. |
 Caspian Gull cachinnans F.C adult, May 2021 - February 2023, Lelystad & Almere, the Netherlands. Picture: Albert de Jong, Roland-Jan Buijs & Mars Muusse. Parent of "nest r-FC", in season 2021. |
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 Caspian Gull cachinnans F|W 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 35" in season 2020. |
 Caspian Gull cachinnans F|S 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong & Mars Muusse. Bird hatched at "nest 13" in season 2021. |
 Caspian Gull cachinnans 5.6 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 203" in season 2022. |
 Caspian Gull cachinnans F.D 1CY-2CY, May 2021 & January 2022, the Netherlands & France. Picture: Albert de Jong, Merijn Loeve, Mars Muusse, Aäron Fabrice & Patrick Derrien.Bird hatched at "nest 003" in season 2021. |
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 Caspian Gull cachinnans F|X 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 02" in season 2020. |
 Caspian Gull cachinnans F|T 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong & Mars Muusse. Bird hatched at "nest 44" in season 2021. |
 Caspian Gull cachinnans 5.7 1CY, May - September 2022, the Netherlands & Guernsey, England. Picture: Duerden Cormack, Thijs Horst & Mars Muusse.Bird hatched at "nest 203" in season 2022. |
 Caspian Gull cachinnans F.E 1CY-2CY, May 2021 - August 2022, the Netherlands & UK. Picture: Merijn Loeve, Tom Whiley, Jonny Rankin & Mike Ball.Bird hatched at "nest 003" in season 2021. |
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 Caspian Gull cachinnans F|Y 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 01" in season 2020. |
 Caspian Gull cachinnans F|U 1CY, May - June 2021, Lelystad, the Netherlands. Picture: Albert de Jong & Mars Muusse. Bird hatched at "nest 12" in season 2021. |
 Caspian Gull cachinnans 5.8 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest r[F.C]" in season 2022. |
 Caspian Gull cachinnans F.F 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong, Merijn Loeve & Mars Muusse. Bird hatched at "nest y-PNED" in season 2021. |
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 Caspian Gull cachinnans F|Z 1CY, May 21 2020, Lelystad,
The Netherlands. Picture: Merijn Loeve.Bird hatched at "nest 09" in season 2020. |
 Caspian Gull cachinnans F|V 1CY-2CY, May 2021 - April 2022, Lelystad, the Netherlands & the UK. Picture: Adam Rowlands, Stuart Ainsworth, Albert de Jong & Mars Muusse. Bird hatched at "nest 58" in season 2021. |
 Caspian Gull cachinnans 5.9 1CY, May 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest r[F.C]" in season 2022. |
 Caspian Gull cachinnans F.G 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong, Merijn Loeve & Mars Muusse. Bird hatched at "nest y-PNED" in season 2021. |
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 Caspian Gull cachinnans F|W 1CY-2CY, May 2021 - January 2022, Lelystad, Almere & Enkhuizen, the Netherlands. Picture: Eric Roeland, Jeroen Nagtegaal, Albert de Jong & Mars Muusse. Bird hatched at "nest 58" in season 2021. |
 Herring Gull argenteus 5.+ 1CY, May 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 117Z" in season 2022. |
 Gull spec. F.H 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched in or near "nest 54". If from "nest 54", then mother is Yellow-legged Gull michahellis hybrid ny-MT which is HY=2013 pullus from Wijk bij Duurstede colony. |
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 Caspian Gull cachinnans F|X 1CY-2CY, May 2021 - June 2022, the Netherlands & UK. Picture: Ian Bartlett, Bethany Wilson, Albert de Jong & Mars Muusse. Bird hatched at "nest PHSV" in season 2021. |
 Herring Gull argenteus 5.= 1CY, May 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 117Z" in season 2022. |
 Herring Gull argenteus F.J 1CY, June - November 2021, Almere, Lelystad & Barneveld, the Netherlands. Picture: Eric Roeland, Timon van den Heuvel, Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 2 near "nest 54", in season 2021. |
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 Caspian Gull cachinnans F|Y 1CY-3CY, May 2021 - March 2023, the Netherlands & Belgium. Picture: Maurice Segers, Eric Roeland, Albert de Jong, Thijs Horst & Mars Muusse. Bird hatched at "nest PHSV" in season 2021. |
 Herring Gull argenteus 5.B 1CY, May 17-30 2022, Lelystad, the Netherlands. Picture: Mars Muusse. Bird hatched at "nest 63" in season 2022. |
 Herring Gull argenteus F.K 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 2 near "nest 38", in season 2021. |
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 Caspian Gull cachinnans F|Z 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong & Mars Muusse. Bird hatched at "nest PHSV" in season 2021. |
 Herring Gull argenteus 5.E 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 63" in season 2022. Dead. |
 Caspian Gull cachinnans F.L 1CY-2CY, June 2021 - May 2022, the Netherlands & Portugal. Picture: Jeroen Nagtegaal, Mars Muusse, Teresa Cohen, José Nunes & Guus van Duin. Bird hatched at "nest 14" in season 2021. |
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 Lesser Black-backed Gull graellsii L|J 1CY, Gijón, Asturias, Spain. Picture: César Fernández González.Bird hatched at De Kreupel, ringed in June 2021. |
 Caspian Gull cachinnans 5.F 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 58" in season 2022. Only chick this year. |
 Caspian Gull cachinnans F.M 1CY, June & September-October 2021, the Netherlands & Belgium. Picture: Gunther Groenez, Jeroen Nagtegaal & Wouter Faveyts. Bird hatched at "nest 14" in season 2021. |
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 Herring Gull argenteus (hybrid?) S|0 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched in nest 17. Mother is Herring Gull, father maybe Caspian Gull. |
 Caspian Gull cachinnans 5.G 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest r[C.S] / 108" in season 2022. |
 Caspian Gull cachinnans F.N 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at "nest 14" in season 2021. |
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 Gull spec. S|2 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong. Bird hatched in nest 42, parents unknown. |
 Caspian Gull cachinnans 5.H 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest r[C.S] / 108" in season 2022. |
 Herring Gull argenteus F.P 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. Brother/sister of r-F.R. |
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 Herring Gull argenteus F2-backcross S|X 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong. Bird hatched at "nest 54" in season 2021. Mother is Yellow-legged Gull michahellis hybrid ny-MT which is HY=2013 pullus from Wijk bij Duurstede colony, offspring from Herring x Yellow-legged Gull. Father is Herring Gull. |
 Caspian Gull cachinnans 5.J 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 21" in season 2022. |
 Herring Gull argenteus F.R 1CY-2CY, June 2021 - October 2022, Lelystad, Den Helder & Katwijk, the Netherlands. Picture: Mardik Leopold, Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. Brother/sister of r-F.P. |
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 Lesser Black-backed Gull graellsii S|Y 1CY, June & August 2021, Lelystad, the Netherlands & Torreira, Portugal. Picture: Roland-Jan Buijs, Jeroen Nagtegaal & Mars Muusse. Bird Hatched at dam 2, next to nest 54. |
 Caspian Gull cachinnans 5.K 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 21" in season 2022. |
 Herring Gull argenteus F.S 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. |
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 Herring Gull argenteus (hybrid?) S|Z 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched in nest 17. Mother is Herring Gull, father maybe Caspian Gull. |
 Caspian Gull cachinnans 5.L 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 40" in season 2022. |
 Herring Gull argenteus F.T 1CY-3CY, June 2021 - March 2023, Lelystad & Almere, the Netherlands. Picture: Thijs Horst, Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. Brother/sister of r-F.U. |
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 Caspian Gull cachinnans 5.M 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 40" in season 2022. |
 Herring Gull argenteus F.U 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. Brother/sister of r-F.T. |
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 Caspian Gull cachinnans 5.N 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 110" in season 2022. |
 Herring Gull argenteus F.V 1CY-2CY, June 2021 - May 2022, the Netherlands. Picture: GertJan Verbeek, Eric Roeland, Mars Muusse & Hans van Muiswinkel. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. |
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 Caspian Gull cachinnans 5.P 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 110" in season 2022. |
 Herring Gull argenteus F.W 1CY-3CY, June 2021 - February 2023, Almere & Lelystad, the Netherlands. Picture: Eric Roeland, Thijs Horst, Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. |
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 Caspian Gull cachinnans 5.R 1CY, May-July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest y[P:U60]" in season 2022. |
 Herring Gull argenteus F.X 1CY-2CY, June 2021 - October 2022, , the Netherlands. Picture: Eric Roeland, Hans van Muiswinkel, Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. |
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 Caspian Gull cachinnans 5.S 1CY, May-July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest y[P:U60]" in season 2022. |
 Caspian Gull cachinnans F.Y 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at "nest r-FB_61" in season 2021. |
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 Caspian Gull cachinnans 5.T 1CY, May-July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest y[P:U60]" in season 2022. |
 Herring Gull argenteus F.Z 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse. Bird hatched at colony Lelystad - dam 1 south section, in season 2021. |
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 Caspian Gull cachinnans 5.U 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 19" in season 2022. |
 Caspian Gull cachinnans K.0 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KA 21" in season 2021. |
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.jpg) Caspian Gull cachinnans 5.V 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 19" in season 2022. |
 Caspian Gull cachinnans K.1 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KA 21" in season 2021. |
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 Caspian Gull cachinnans 5.W 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 112" in season 2022. |
 Caspian Gull cachinnans K.2 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KB 21" in season 2021. |
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 Caspian Gull cachinnans 5.X 1CY-2CY, May 2022 - February 2023, the Netherlands. Picture: Hans van Muiswinkel, Thijs Horst & Mars Muusse.Bird hatched at "nest 112" in season 2022. |
 Caspian Gull cachinnans K.3 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KB 21" in season 2021. |
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 Caspian Gull cachinnans 5.Y 1CY, May - July 2022, the Netherlands & Cromer, England. Picture: Andy Hale, Thijs Horst & Mars Muusse.Bird hatched at "nest 137" in season 2022. |
 Caspian Gull cachinnans K.4 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KB 21" in season 2021. |
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 Caspian Gull cachinnans 5.Z 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 137" in season 2022. |
 Herring Gull argenteus K.5 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest M06 21" in season 2021. |
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 Caspian Gull cachinnans hybrid 6.0 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 18" in season 2022. |
 Herring Gull argentatus K.6 1CY-2CY, May 2021 & February 2022, De Kreupel & Medemblik, the Netherlands. Picture: Leon Kelder & Renate Visscher. Bird hatched at "nest M06 21" in season 2021. |
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 Caspian Gull cachinnans 6.2 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 135" in season 2022. |
 Herring Gull argenteus K.7 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest KC 21" in season 2021. |
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 Caspian Gull cachinnans 6.3 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 135" in season 2022. |
 Caspian Gull cachinnans K.8 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest M01 21" in season 2021. |
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 Herring Gull argenteus hybrid 6.5 1CY, May - July 2022, Lelystad & Almere, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 244" in season 2022. |
 Caspian Gull cachinnans K.9 1CY, May 14 2021, De Kreupel - M, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest M01 21" in season 2021. |
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 Caspian Gull cachinnans hybrid 6.7 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 244" in season 2022. |
 Caspian Gull cachinnans K.+ 1CY, May 14 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest L01 21" in season 2021. |
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 Caspian Gull cachinnans hybrid 6.8 1CY, May - June 2022, Lelystad & Almere, the Netherlands. Picture: Thijs Horst, Mars Muusse & Eric Roeland.Bird hatched at "nest 244" in season 2022. |
 Caspian Gull cachinnans K.= 1CY, May 14 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest L01 21" in season 2021. |
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 Herring Gull argenteus 6.9 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 118Z" in season 2022. |
 Caspian Gull cachinnans K.A adult, April & September 2021, De Kreupel & Enkhuizen,
the Netherlands. Pictures: Debby Doodeman & Merijn Loeve. Parent of "nest KA 21" in season 2021. |
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 Herring Gull argenteus 6.A adult, May 22 2022, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.Bird breeding at "nest r[6.A]" in season 2022. |
 Caspian Gull cachinnans (hybrid?) K.B adult, April 23 2021, De Kreupel - M,
the Netherlands. Pictures: Merijn Loeve. Parent of "nest KB 21" in season 2021. |
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 Herring Gull argenteus 6.B adult, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst, Jeroen Nagtegaal & Mars Muusse.Bird breeding at "nest r[6.B]" in season 2022. |
 Herring Gull argenteus K.C adult, April 23 2021, De Kreupel - M,
the Netherlands. Pictures: Merijn Loeve. Parent of "nest KC 21" in season 2021. |
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 Herring Gull argenteus 6.C adult, May - July 2022, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.Bird breeding at "nest 246Z" in season 2022. |
 Caspian Gull cachinnans K.D adult, April & November - December 2021, De Kreupel & Houten,
the Netherlands. Pictures: Merijn Loeve & Herman Bouman. Parent of "nest KD 21" in season 2021. |
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 Herring Gull argenteus 6.D 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.Bird hatched at "nest 123Z" in season 2022. |
 Caspian Gull cachinnans hybrid K.E adult, April 23 2021, De Kreupel - L,
the Netherlands. Pictures: Merijn Loeve. Parent of "nest KE 21" in season 2021. |
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 Herring Gull argenteus 6.E 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst, Jeroen Nagtegaal & Mars Muusse.Bird hatched at "nest 123Z" in season 2022. |
 Caspian Gull cachinnans K.F adult, April 2021 - January 2023,
the Netherlands. Pictures: Merijn Loeve, Fred Visscher & Jeroen van Assema.Parent of "nest KF 21" in season 2021. |
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 Herring Gull argenteus 6.F 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.Bird hatched at "nest 61Z" in season 2022. |
Caspian Gull cachinnans K.G (was 02P4) 7CY-9CY, April 2020 & 2021, February 2022, De Kreupel & Medemblik,
the Netherlands. Pictures: Leon Kelder, Merijn Loeve & Renate Visscher. Parent of "nest r02P4 21" in season 2021. |
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 Herring Gull argenteus 6.G 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 61Z" in season 2022. |
 Caspian Gull cachinnans K.H adult, April 23 2021, De Kreupel - C,
the Netherlands. Pictures: Merijn Loeve. Parent of "nest KH 21" in season 2021. |
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 Caspian Gull cachinnans 6.H 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 204" in season 2022. |
 Herring Gull argenteus hybrid K.J adult, April 23 2021, De Kreupel - C,
the Netherlands. Pictures: Merijn Loeve. Parent of "nest KJ 21" in season 2021. |
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 Caspian Gull cachinnans 6.J 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 204" in season 2022. |
 Caspian Gull cachinnans K.K adult, April 2021 & July 2022, De Kreupel,
the Netherlands. Pictures: Merijn Loeve & Jeroen van Assema.Parent of "nest KK 21" in season 2021. |
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 Caspian Gull cachinnans 6.K 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 139" in season 2022. |
 Caspian Gull cachinnans K.L 1CY, May - September 2021, De Kreupel, the Netherlands, Kilnsea & Cromer, Norfolk, UK. Picture: Andrew Hale & Leon Kelder. Bird hatched at "nest D07 21" in season 2021. |
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 Caspian Gull cachinnans (hybrid) 6.L 1CY, June - September 2022, Lelystad & Almere, the Netherlands. Picture: Guus van Duin, Thijs Hors, Mars Muusse & Eric Roeland.Bird hatched at "nest 139" in season 2022. |
 Caspian Gull cachinnans K.M 1CY, May - June 2021, De Kreupel - E, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest E01 21" in season 2021. |
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 Caspian Gull cachinnans 6.M 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 139" in season 2022. |
 Caspian Gull cachinnans K.N 1CY, May 14-20 & June 11 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest D07 21" in season 2021. |
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 Herring Gull argenteus 6.N adult, May 22 2022, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.Bird breeding at dam 2 in season 2022. |
 Caspian Gull cachinnans K.P 1CY, May 14 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest D05 21" in season 2021. |
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 Caspian Gull cachinnans 6.P 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 38" in season 2022. |
 Caspian Gull cachinnans K.R 1CY, May 14 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest D05 21" in season 2021. |
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 Caspian Gull cachinnans 6.R 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 38" in season 2022. |
 Caspian Gull cachinnans K.S 1CY-2CY, May 2021 & January 2022, De Kreupel & Vlissingen, the Netherlands. Picture: Leon Kelder & Sander Lilipaly. Bird hatched at "nest D05 21" in season 2021. |
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 Caspian Gull cachinnans 6.S 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 55" in season 2022. |
 Caspian Gull cachinnans K.T 1CY, May - June & December 2021, De Kreupel, the Netherlands & Dungeness, UK. Picture: Leon Kelder & Martin Casemore. Bird hatched at "nest L02 21" in season 2021. |
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 Herring Gull argentatus hybrid 6.T 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 54 / zy[M.T]" in season 2022. |
 Caspian Gull cachinnans K.U 1CY, May - June 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest L02 21" in season 2021. |
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 Caspian Gull cachinnans 6.U 1CY, July - August 2022, Lelystad, the Netherlands & Cotesbach, England. Picture: Carl Baggott, Thijs Horst & Mars Muusse. Bird hatched at "nest y[X540]" in season 2022. |
 Caspian Gull cachinnans K.V 1CY, May - October 2021, De Kreupel, the Netherlands, St-Aubin-sur-Mer, France & Morecambe Bay, U.K. Picture: Leon Kelder, Paul Ellis & Julien Yvon.Bird hatched at "nest L02 21" in season 2021. |
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 Caspian Gull cachinnans 6.V 1CY, May - October 2022, the Netherlands & England. Picture: Rob Creek, Thijs Horst & Mars Muusse.Bird hatched at "nest y[X540]" in season 2022. |
 Caspian Gull cachinnans K.W 1CY-2CY, May 2021 & January 2022, De Kreupel, the Netherlands & Sonzay, France. Picture: Leon Kelder & Patrick Derrien.Bird hatched at "nest L05 21" in season 2021. |
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 Caspian Gull cachinnans hybrid 6.W 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 48" in season 2022. |
 Caspian Gull cachinnans K.X 1CY, May 14 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest L05 21" in season 2021. |
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 Caspian Gull cachinnans hybrid 6.X 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 48" in season 2022. |
 Caspian Gull cachinnans K.Y 1CY, May 14 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder. Bird hatched at "nest L05 21" in season 2021. |
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 Herring Gull argentatus hybrid 6.Y 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 44" in season 2022. |
 Caspian Gull cachinnans K.Z 1CY, May & September 2021, De Kreupel, the Netherlands & Cley Marsh, UK. Picture: Leon Kelder & Mark Golley. Bird hatched at "nest L01 21" in season 2021. |
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 Caspian Gull cachinnans hybrid 6.Z 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 18" in season 2022. |
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.jpg) Herring Gull argenteus 6.+ 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 118Z" in season 2022. |
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 Herring Gull argenteus 6.= 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest r[6.A]" in season 2022. |
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 Herring Gull argenteus 7.A 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest w-8Z" in season 2022. No observation after ringing. |
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 Caspian Gull cachinnans 7.B 1CY-2CY, May 2022 - January 2023, the Netherlands & France. Picture: Thijs Horst, Mars Muusse & Geoffroy Chabot.Bird hatched at "nest n[F|N]" in season 2022. |
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 Herring Gull argenteus 7.C 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.Bird hatched at "nest 128Z" in season 2022. |
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 Caspian Gull cachinnans 7.D 1CY, May - September 2022, the Netherlands & England. Picture: Andy Deighton, Thijs Horst & Mars Muusse.Bird hatched at "nest 110" in season 2022. |
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 Caspian Gull cachinnans 7.E 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 34" in season 2022. |
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 Caspian Gull cachinnans 7.F 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 34" in season 2022. |
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 Caspian Gull cachinnans hybrid 7.G 1CY-2CY, May 2022 - February 2023, Lelystad & Almere, the Netherlands. Picture: Thijs Horst, Mars Muusse & Eric Roeland.Bird hatched at "nest 130" in season 2022 (Caspian x Herring Gull). |
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 Yellow-legged Gull michahellis hybrid 7.K 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Bird hatched at "nest 132" in season 2022. |
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