Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Leon Kelder
Mars Muusse

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Caspian Gull cachinnans D|V 1CY, May - July 2021, De Kreupel - E, the Netherlands. Picture: Leon Kelder.

Blue tibia ring b[D|V], ringed as pullus Larus cachinnans on May 20 2021 at nest E01 21 in colony De Kreupel, the Netherlands.
ID is uncertain: both parents are unknown.

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

below: Caspian Gull cachinnans D|V 1CY, June 11 2021, De Kreupel - E, the Netherlands. Picture: Leon Kelder.

below: Caspian Gull cachinnans D|V 1CY, July 02 2021, De Kreupel - E, the Netherlands. Picture: Leon Kelder.

Bird has several infection now, on feed and on nape.

Date: details:          
14-5-2021 2 pulli in nest.        
           
20-5-2021 2 pulli in nest. Ring r-K.M & metal reused here. metal: tibia: mass (gr): head + bill: .
Prey: Roach 2x; Eel 1x. NLA 5.556.756 b-D|V 135 57.5 32.4 = tarsus
https://waarneming.nl/observation/214708690/ NLA 5.556.720 r-K.M 334 76.1 60.5 = wing
         
11-6-2021 2 pulli in nest. metal: tibia: mass (gr): head + bill: wing:
  https://waarneming.nl/observation/216987573/ NLA 5.556.756 b-D|V 654 94.0 160.0
    NLA 5.556.720 r-K.M 1104 119.9 289.5
             
2-7-2021 1 chick near nest. metal: tibia: mass (gr): head + bill: wing:
  NLA 5.556.756 b-D|V 914 116.0 331.0