Larus cachinnans

(last update: February 16, 2013)

Coordinator:
Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)

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cachinnans plumages

Larus cachinnans 1CY XXEN September & November 2014, the Netherlands. Picture: Edwin Kerssens & Jacob Jan de Vries.

Data pending, probably ringed as pullus in Oberspreewald-Lausitz, Brandenburg, Germany (51°42'00"N 014°06'00"E). This is 100 km SE of Berlin and Lausitz holds a mixed colony in the lake. At this location ringing takes place in colonies of mixed species, with Herring, Caspian and Yellow-legged Gull, so identification is not always straight forward. The possibility that juveniles are not a pure bird is therefore not unlikely.

This green XXEN seems to be cachinnans, albeit with 'spread out' streaking on head (you would prefer it concentrated in the hindneck; overall streaking is more like in Herring Gulls).

below: Larus cachinnans 1CY XXEN September 14 2014, IJmuiden, the Netherlands. Picture: Edwin Kerssens.

Lower scapulars still juvenile. Coverts and tertials also juvenile.

below: Larus cachinnans 1CY XXEN November 18 2014, Terschelling, the Netherlands. Picture: Jacob Jan de Vries.

Coverts and tertials juvenile.