Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|9 1CY-2CY, May 2021 - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst, Eric Roeland, Mars Muusse & Albert de Jong.
Tibia B-F|9 and metal NLA Arnhem 5.559.423, ringed as pullus Larus cachinnans on May 28 2021 at Lelystad (Bataviahaven), Holland (5230.00 N 525.00 E) - ringer Roland-Jan Buijs.
Hybrid, ringed as pullus Caspian Gull cachinnans x Herring Gull argentatus.
ID certain, father is adult Caspian Gull and mother is Herring Gull in nest 34. Brother/sisters are b-F|8 and b-F|+.
Recoveries:
11-9-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
11-9-2021 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
9-10-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
27-06-2022 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
29-06-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Peter van Horssen
04-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Peter van Horssen
Visits and data.
| date: | ||||||
| 24-03-2021 | 2 adults at this location. | |||||
| 06-05-2021 | 2 adults guarding at blocks. Red flag "71" placed to mark location. | |||||
| egg no: | width (mm) | length (mm) | volume (cm3): | water test on May 6th: | ||
| A | 50,7 | 74,5 | 96,42 | 90 - tip at bottom. | ||
| B | 50,3 | 70,3 | 89,56 | 90 - tip at bottom. | ||
| C | 50,4 | 71,1 | 90,93 | 90 - tip at bottom. | ||
| sum nest: | 276,91 | |||||
| 13-05-2021 | no visit, Camilla is trapping a Spoonbill. | |||||
| 15-05-2021 | nest with 3 eggs. Flag put up again, for it was not visible. | |||||
| metal ring | plastic | head + bill: | ||||
| 28-5-2021 | pullus | .5559422 | b-F|8 | 64 | ||
| pullus | .5559423 | b-F|9 | 52 | |||
| pullus | .5559424 | b-F|+ | 62 | |||
| 08-06-2021 | 1 adult at this location. | |||||
below: Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|9 2CY, June 30 2022, Almere, the Netherlands. Picture: Thijs Horst.
below: Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|9 2CY, June 28 2022, Almere, the Netherlands. Picture: Mars Muusse.
Herring Gull jizz.
below: Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|9 1CY, October 09 2021, Almere, the Netherlands. Picture: Eric Roeland.
Especially in relaxed pose much resembling Herring Gull.
below: Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|9 1CY, September 11 2021, Almere, the Netherlands. Picture: Eric Roeland.
Much resembling Herring Gull on jizz and with streaked head, but note ill-defined notching on tertials and rather dark outerwebs on inner primaries.
below: Hybrid Caspian Gull cachinnans x Herring Gull argenteus F|9 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong.
