Larus cachinnans

Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

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

Lelystad 2022:
nest y-PNED
nest y-PHSV / r-CG
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X540
nest y-XCHP
nest w-327:U
nest n-F|N
nest r-6A
nest r-6B
nest r-6C
nest r-CS
nest r-FC
nest w-8Z
nest zy-MT
nest 003
nest 011
nest 012
nest 014
nest 015
nest 017
nest 017B
nest 018
nest 019
nest 021
nest 026
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 058
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 109
nest 111
nest 112
nest 113
nest 117Z
nest 118Z
nest 123Z
nest 124Z
nest 125Z
nest 126Z
nest 127Z
nest 128Z
nest 129Z
nest 131Z
nest 132 YLG
nest 133
nest 134
nest 135
nest 136
nest 137
nest 138
nest 139
nest 143Z
nest 203
nest 204
nest 207
nest 222Z
nest 227
nest 228Z
nest 229
nest 230Z
nest 231
nest 240Z
nest 244
nest 245Z

**Caspian Gull cachinnans hybrid 6.7 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.**

Red tibia ring r[6.7] and metal NLA 5.625.151, ringed as pullus Larus cachinnans hybrid at nest 244 on May 30 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs ringing team.
ID certain in 2022: one parent is adult Herring Gull argenteus and other parent is sub-adult Caspian Gull cachinnans.

4-May-22	3 eggs	A egg	65,4	51	floating - 4 mm
		B egg	67,8	49	floating - 4 mm
		C egg	63,4	47,6	floating - 4 mm
	sub-adult cachinnans at this nest.
		metal	darvic	mass	wing	H+B	age
22-May-22	pullus	.5625150	-	73	27	50,8	2 days, too small for darvic ring.
	pullus	.5625151	-	68	24	50,2	2 days, idem.
	pullus	.5625152	-	60	22	47	1st day, idem.
		metal	darvic	mass	wing	H+B	bill
30-May-22	pullus	.5625150	r-68	267	45	67,6	26
	pullus	.5625151	r-67	258	46	68,1	24
	pullus	.5625152	r-65	244	38	63,6	23
02-Jun-22	probably Herring gull at this nest? But be aware of other nest close by.
17-Jun-22	adult Herring gull neat nest.
21-Jun-22	pullus	darvic	mass	H+B	Bill	Tarsus	Wing
		r-68	888	111	42,2	77,5	255

**below: Caspian Gull cachinnans hybrid 6.7 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.**

r[6.7] cachinnans x argentatus hybrid from nest 244. Picture: May 30th, 2022.
Ringed on May 30th. No observations since. Same for sibling r[6.5]. Sibling r[6.8] fledged.