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 C.W 1CY, May - November 2022, Lelystad, Almere & Spakenburg, the Netherlands. Picture: Hans van Muiswinkel, Thijs Horst & Mars Muusse.**

Red tibia ring r[C.W] and metal NLA 5.625.071, ringed as pullus Larus cachinnans at nest 17B on May 09 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
ID certain in 2022, both parents are Caspian Gull cachinnans.

Recoveries:
19-8-2022 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Thijs Horst
2-11-2022 Bunschoten-Spakenburg (Visverwerker), Utrecht, NL 5.215,00 N 523,00 E colourring read Hans van Muiswinkel

Visits and data 2022: Estimation egg laying: A-egg = April 08 2022. Estimating hatching = May 06 2022.

15-04-2022	A egg	68,1	50,4	tip bottom - 40	2 blue eggs.
	B egg	65,6	49,7	tip bottom - 40
	C egg	68,7	50,6	tip bottom - 40

19-04-2022	2 parents present at nest.

29-04-2022	A egg			float - 1 mm
	B egg			float - 1 mm
	C egg			float - 1 mm

01-05-2022	female is cachinnans.

09-05-2022	pullus	r-C.V		NLA 5625070
	pullus	r-C.W		NLA 5625071
	pullus	--		NLA 5625072	pullus too small for plastic.

		colour		metal	mass	wing	head + bill	bill
17-05-2022	pullus	r-C.V		NLA 5625070	257

30-05-2022	pullus	r-C.V		NLA 5625070	615	175	95,1	39,3
	food: fish is Roach

02-06-2022	male alarming.

17-06-2022	No birds near nest, r-CW flying around at north side.

21-06-2022	No activities near nest, r-CV & r-CW & 3rd chick (only mmetal?) swimming at north side. If so, then 3x chicks fledged from this nest.

12-07-2022	R-CV & r-CW photographed.

17-05-2022	R-CW photographed.

**below: Caspian Gull cachinnans C.W 1CY, November 02 2022, Bunschoten-Spakenburg, the Netherlands. Picture: Hans van Muiswinkel.**

**below: Caspian Gull cachinnans C.W 1CY, August 23 2022, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.**

**below: Caspian Gull cachinnans C.W 1CY, August 19 2022, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.**

**below: Caspian Gull cachinnans C.W 1CY, July 17 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.**

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

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

r[C.W] cachinnans from nest 17B. Picture: June 21st, 2022.
Fledged. Sibling r[C.V] also fledged. Unringed bird in the group is probably 3rd sibling from nest 17B, also fledged.