Larus cachinnans

Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse

Project Info
International trend
National trend
Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future

**Yellow-legged Gull michahellis hybrid 7.K 1CY-4CY, May 2022 - March 2025, Lelystad & Almere, the Netherlands. Picture: Mars Muusse, Thijs Horst & Eric Roeland.**

Red tibia ring r[7.K] and metal NLA 5.625.189, ringed as pullus Larus michahellis hybrid at nest 132 on May 30 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs ringing team.

Recoveries:
26-02-2023 Neder-over-Heembeek (Budabrug), Brussel, BELGIE 5.054,00 N 424,00 E colourring read Michel Janssens & Maurice Segers
06-06-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
08-06-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Mark Zevenbergen
12-08-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
13-08-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
04-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
15-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
18-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
20-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
23-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
24-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
30-03-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Harry Kuipers & Thijs Horst
31-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
05-05-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-06-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
20-11-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
21-11-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
23-12-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
25-03-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse

ID uncertain, one parent is Yellow-legged Gull michahellis, other parent most likely Herring Gull argentatus. Might even be Herring Gull g[97] again.

27-Apr-22	3 eggs	A egg	69,5	50,9	tip bottom - 20 gr
		B egg	68,7	49,8	tip bottom - 20 gr
		C egg	64,1	48,7	horizontal
17-May-22	3 eggs
		metal	darvic	mass	wing	H+B	Bill
30-May-22	pullus	5625189	r-7.K	280	46	68	25,2
	adult	YLG between many LBBG. YLG was standing right next to this chick.
21-Jun-22	michahellis present. But also former partner g-97! (2020, 2021)

**below: Yellow-legged Gull michahellis hybrid 7.K** 4CY, March 25 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.

**below: Yellow-legged Gull michahellis hybrid 7.K 3CY**, November 21 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

**below: Yellow-legged Gull michahellis hybrid 7.K 3CY**, November 20 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

**below: Yellow-legged Gull michahellis hybrid 7.K 3CY**, March 31 2024, Almere, the Netherlands. Picture: Eric Roeland & Thijs Horst.

**below: Yellow-legged Gull michahellis hybrid 7.K 3CY**, March 30 2024, Almere, the Netherlands. Picture: Eric Roeland & Thijs Horst.

**below: Yellow-legged Gull michahellis hybrid 7.K 3CY, February 15 2024**, Almere, the Netherlands. Picture: Thijs Horst.

**below: Yellow-legged Gull michahellis hybrid 7.K** 2CY, June 06 2023, Almere, the Netherlands. Picture: Mars Muusse.

**below: Yellow-legged Gull michahellis hybrid 7.K 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.**

**below: Yellow-legged Gull michahellis hybrid 7.K 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.**

r[7.K] michahellis hybrid from nest 132. Picture: May 30th, 2022.
Ringed May 30th. No observations since, but several at this location. No confirmation on 2 other eggs.

Larus cachinnans in the Netherlands

Yellow-legged Gull michahellis hybrid 7.K 1CY-4CY, May 2022 - March 2025, Lelystad & Almere, the Netherlands. Picture: Mars Muusse, Thijs Horst & Eric Roeland.

below: Yellow-legged Gull michahellis hybrid 7.K 4CY, March 25 2025, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Yellow-legged Gull michahellis hybrid 7.K 3CY, November 21 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Yellow-legged Gull michahellis hybrid 7.K 3CY, November 20 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Yellow-legged Gull michahellis hybrid 7.K 3CY, March 31 2024, Almere, the Netherlands. Picture: Eric Roeland & Thijs Horst.

below: Yellow-legged Gull michahellis hybrid 7.K 3CY, March 30 2024, Almere, the Netherlands. Picture: Eric Roeland & Thijs Horst.

below: Yellow-legged Gull michahellis hybrid 7.K 3CY, February 15 2024, Almere, the Netherlands. Picture: Thijs Horst.

below: Yellow-legged Gull michahellis hybrid 7.K 2CY, June 06 2023, Almere, the Netherlands. Picture: Mars Muusse.

below: Yellow-legged Gull michahellis hybrid 7.K 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Yellow-legged Gull michahellis hybrid 7.K 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.