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

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 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 D|0 1CY-2CY, May 2021 & January 20-21 2022, De Kreupel, the Netherlands & Sonzay, France. Picture: Leon Kelder & Patrick Derrien.

Blue tibia ring b[D|0] and metal NLA 5.556.757, ringed as pullus Larus cachinnans on May 20 2021 at nest w-201:U in colony De Kreupel (IJsselmeer), the Netherlands (5247.00 N 513.00 E) - ringer Leon Kelder.
ID certain, parents known as mother Caspian Gull cachinnans w[201:U] and unringed father Caspian Gull cachinnans.

Recoveries:
28-05-2021 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
20-01-2022 Sonzay (Vuilstort), Indre-et-Loire, FRANKRIJK 4.730,00 N 28,00 E colourring read Patrick Derrien
21-01-2022 Sonzay (Vuilstort), Indre-et-Loire, FRANKRIJK 4.730,00 N 28,00 E colourring read Patrick Derrien

below: Caspian Gull cachinnans D|0 2CY, 2CY, January 20-21 2022, Sonzay dump, France. Picture: Patrick Derrien.

below: Caspian Gull cachinnans D|0 1CY, May 20 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder.

Visits:

Date: details:            
           
23-4-2021 1 egg in nest. egg no: width (mm): length (mm): volume (cm3): 
Attempt to trap breeding adult. Failed. A egg 50.6 73.8
           
14-5-2021 2 eggs in nest.        
2 adults near nest. One ringed w[201:U].      
https://waarneming.nl/observation/214662645/            
           
20-5-2021 1 egg hatching & 1 chick. metal: tibia: mass (gr): head + bill: tarsus:  
Prey: 1x Roach. NLA 5.556.757 b-D|0 75 48.6 27.8  
https://waarneming.nl/observation/214707336/            
  Camera trap near nest: 1 pullus & 2 adults.            
  https://waarneming.nl/observation/223648760/            
   
28-5-2021 2 chicks in nest. metal: tibia: mass (gr): head + bill: tarsus:
  Unringed male Caspian & w[201:U] female Caspian. NLA 5.556.757 b-D|0 231 66.7 41.6  
    NLA 5.556.771 r-B.2 168 61.2 36.2