European Herring Gull Green FASC with Thayeri pattern and pseudo-mirror on P10 – 20150524

Images of European Herring Gull Larus argentatus argenteus with an a-typical primary pattern on the underwing: a Thayeri-pattern on P10 in the right underwing and a pseudo-mirror on P10 in the left underwing.

Green FASC is a female and was ringed in the gull colony on Texel, the Netherlands as an adult in May 2013. The photos were taken on 24 May 2015 at the sand suppletion activities that took place near Den Helder, the Netherlands.





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