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

Home

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

Nests at De Kreupel 2020
nest r-02P4 20
nest y-X804 20
nest D01 20
nest D02 20
nest D03 20
nest L01 20
nest L02 20
nest L03 20
nest M02 20

Nests at De Kreupel 2021
nest r-02P4 20
nest w-201U 21
nest g-XLHD 21
nest r-KA 21
nest r-KB 21
nest r-KC 21
nest r-KD 21
nest r-KE 21
nest r-KF 21
nest r-KH 21
nest r-KJ 21
nest r-KK 21
nest A01 21
nest C03 21
nest C04 21
nest C06 21
nest D01 21
nest D03 21
nest D05 21
nest D06 21
nest D07 21
nest D08 21
nest E01 21
nest H01 21
nest L01 21
nest L02 21
nest L05 21
nest L06 21
nest L07 21
nest M01 21
nest M04 21
nest M06 21
nest Q01 21

Caspian Gull cachinnans K.Z 1CY, May & September 2021, De Kreupel, the Netherlands & Cley Marsh, UK. Picture: Leon Kelder, Tom Whiley & Mark Golley.

Red tibia ring r[K.Z], ringed as pullus Larus cachinnans on May 14 2021 at nest L01 in colony De Kreupel, the Netherlands.
ID is uncertain: both parents are unknown.

Date: details:          
9-4-2021 2 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
https://waarneming.nl/observation/210431063/ A egg 50.2 72.5
  B egg 50.7 71.2
           
23-4-2021 3 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
  A egg 49.9 72.2
  B egg 51.2 71.2
Attempt to trap breeding adult. Failed. C egg 49.9 72.9
         
14-5-2021 3 pulli in nest. metal: tibia: mass (gr): head + bill: tarsus:
https://waarneming.nl/observation/214663458/ NLA 5.556.731 Red K.Z 205 65.5 41.7
  NLA 5.556.732 Red K.= 250 67.3 43.6
NLA 5.556.733 Red K.+ 239 68.3 42.9
           
20-5-2021 Only 1 chick found between blocks. metal: tibia: mass (gr): head + bill: wing:
NLA 5.556.733 Red K.+ 547 85.6 90.0
             
   
28-5-2021 No chicks, but many shit traces.          
  Prey: Rounded Goby 1x https://waarneming.nl/observation/215269092/

below: Caspian Gull cachinnans K.Z 1CY, September 27 2021, Cromer, Norfolk, UK (5.255,00 N 118,00 E). Picture: Tom Whiley.

below: Caspian Gull cachinnans K.Z 1CY, September 27 2021, Cley Marsh NWT Reserve, Norfolk, UK. Picture: Mark Golley.

below: Caspian Gull cachinnans K.Z 1CY, May 14 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder.