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

Nests at 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 5.Y 1CY-2CY, May 2022 - April 2023, the Netherlands & England. Picture: Mark Golley, Andy Hale, Thijs Horst & Mars Muusse.**

Red tibia ring r[5.Y] and metal NLA 5.625.127, ringed as pullus Larus cachinnans at nest 137 on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Albert de Jong / Herman Bouman.
ID certain, parents are male and female Caspian Gull.

Recoveries:
21-09-2022 Cromer (Strand), Norfolk, ENGELAND 5.255,00 N 118,00 E colourring read Andrew Hale
11-04-2023 Cley (Marshes), Norfolk, ENGELAND 5.257,00 N 103,00 E colourring read Mark Golley
22-04-2023 Minsmere (RSPB Reserve), Suffolk, ENGELAND 5.214,00 N 136,00 E colourring read David Fairhurst

Visits and data 2022 for nest 137:
Estimation egg laying: A-egg = April 12 2022. Estimating hatching = May 10 2022.

	egg no:	width (mm):	length (mm):	volume (cm3):	water test April 27th:
27-04-2022	A-egg	50	69,5	--	2 mm - floating	3 eggs
	B-egg	48,2	67,2	--	1 mm - floating
	C-egg	49,8	68,8	--	1 mm - floating
			sum nest:	--

01-05-2022	Cach at nest, female = partner 1.

	metal	darvic	mass	head+bill
17-05-2022	.5625126	r-5Z	137	62,5
	.5625127	r-5Y	202	72,7

22-05-2022	Nest empty, chicks not found in dense vegetation. 2 alarming partners.

17-06-2022	1 parent present, together with at least one chick. No good views on legs, no definite view for presence of rings.

21-06-2022	2 parents present, together with r-5Y. Also: 1x unringed sibling. Hence: all 3 eggs hatched. At least 2 chicks fledged from this nest; no fledging data for r-5Z.

28-06-2022	Picture of r-5Y. Fledged.

12-07-2022	Picture of r-5Y. Fledged.

**below: Caspian Gull cachinnans 5.Y 2CY, April 11 2023, Cley, England. Picture: Mark Golley.**

Probably male.

**below: Caspian Gull cachinnans 5.Y 1CY, September 21 2022, Cromer, England. Picture: Andy Hale.**

**below: Caspian Gull cachinnans 5.Y 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.**

**below: Caspian Gull cachinnans 5.Y 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.**

r[5.Y] cachinnans from nest 137. Picture: June 28th, 2022.
Fledged. Sibling r[5.Z] ringed on May 17th and not recorded since. Unringed sibling together with r[5.Y] on June 21st, fledged.