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

Nests at Lelystad 2023
nest y-PNED
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X60J
nest y-XCHP
nest w-327:U
nest n-F|6
nest n-F|8
nest n-F|+
nest n-F|N
nest r-6B
nest r-CG
nest w-8Z
nest 003
nest 006
nest 013
nest 014
nest 015
nest 017
nest 017B
nest 018
nest 019
nest 021
nest 026
nest 033
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 108
nest 109
nest 111
nest 112
nest 127Z
nest 131Z
nest 132 YLG
nest 135
nest 139
nest 147Z
nest 154
nest 163
nest 167
nest 168
nest 204
nest 206
nest 207
nest 223
nest 227
nest 230Z
nest 231
nest 244Z
nest 245Z
nest 248
nest 251
nest 252
nest 253
nest 254
nest 255Z
nest 256Z
nest 262

Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|R 1CY, May 2023 - April 2024, Lelystad & Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tibia ring G-8|R and metal NLA 5.625.281, ringed as pullus Larus cachinnans on May 18 2023 in nest 048 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.

egg sizes & volume 2023
SPECIES	NEST	A_length	A_width	A_volume	B_length	B_width	B_volume	C_length	C_width	C_volume	TOTAL NEST:	known parents?
cach x teus	48-2023	73,2	48,5	86,69	72,4	48,2	84,69	67,5	48,4	79,61	251,00	same as 2022

ring pulli: 20-mei		laying A egg: 15-apr		hatch A egg: 13-mei


catch:	date:	metal:	darvic:	mass:	wing:	head+bill:
Pullus	27-5-2023	5.625.264	G-8\|P	394	--	--	is nest 15B, full throat pouch with fish.
Pullus	27-5-2023	5.625.281	G-8\|R	435	--	--	is nest 15B
Pullus	18-6-2023	5.625.281	G-8\|R	918	301	113,0	hybrid type


48-2023	was 15B
dam:	dam 2 central
location:	Next to prunus, 1 mtr E of code 44 on blocks. 4 mtr from waterfront.
breeders:	cach x teus
OBSERVATIONS:
09-4-2023	nest:	no eggs, nest is ready.
26-4-2023	nest:	3 eggs measured, and water test:	A: 80 - tip bottom
			B: 80 - tip bottom
27-4-2023	adult:	cach & teus, cach breeding.	C: 90 - tip bottom
		cach with patterns on P4.
11-5-2023	eggs	floating - 5 mm.
27-5-2023	pulli:	2x chicks ringed and measured.
18-6-2023	pulli:	1x control of g-8\|R, which is hybrid type. Fledged: 1x juvenile.
25-6-2023	pulli:	G-8\|R present.

below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|R 2CY, April 18 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|R 1CY, July 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|R 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|R 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|R 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 8|R 1CY, May 27 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.