Larus cachinnans(last update: |
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Coordinator: Greg Neubauer Marcin Przymencki Albert de Jong Mars Muusse cachinnans plumages |
Larus argentatus sensu lato 4P18 adult, May 05 2014 & October 25 2014, Zastów Karczmiski & Wroclaw, Odra River, Poland. Picture: Łukasz Bednarz ringing team. Please visit Łukasz's BLOG for beautiful drawings and up-to-date gull news from eastern Poland: Wildlife art and illustration Location: Zastów Karczmiski, Poland - colony at the banks of the Middle Vistula river. Middle Vistule river is a location where several taxa breed: see composition. Since this is a mixed breeding population where hybridisation is not uncommon, the ringing centre in Poland decided to label birds "Larus argentatus sensu lato". Still bulk of the breeding birds in Middle Vistula region show features of cachinnans. below: Larus argentatus sensu lato 4P18 adult, May 05 2014, Zastów Karczmiski, Poland. Picture: Łukasz Bednarz ringing team. Breeding bird trapped at the nest, showing some similarity to argentatus (F2?) in clean iris, obvious gonys (Bill ratio: 3,15), really pink legs and orange orbital ring. All these features can be found in cachinnans as well however.
below: Larus argentatus sensu lato 4P18 adult, October 25 2014, Wroclaw, Odra River, Poland. |