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

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Caspian Gull cachinnans B.4 1CY, May 28 2021, De Kreupel - H, the Netherlands. Picture: Leon Kelder.

Red tibia ring r[B.4], ringed as pullus Larus cachinnans on May 28 2021 at nest H01 in colony De Kreupel, the Netherlands.
ID is certain: both parents are Caspian Gull cachinnans.

Date: details:          
28-5-2021 2 unringed adult Caspian Gull cachinnans at soil stockpile.        
  3 pulli in nest. metal: tibia: mass (gr): head + bill: tarsus:
https://waarneming.nl/observation/215268851/ NLA 5.556.772 r-B.3 180 64.1 37.3
  NLA 5.556.773 r-B.4 133 58.7 37.5
NLA 5.556.774 r-B.5 270 70.8 53.5
         
11-6-2021 1 pullus near nest. metal: tibia: mass (gr): head + bill: wing:
  https://waarneming.nl/observation/216987621/ NLA 5.556.774 r-B.5 805 104.4 190.5