2nd winter plumage
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Identification of Thayer’s Gull has been a hot potato for a long time, and remains so today. This photo-essay has been put together to encourage birders to look for second winter Thayer’s, an age group that has yet to be recorded in Europe, and to discuss identification criteria. Done in pdf format to download, print off, and use in the field etc…
Chris Gibbins and Martin Garner
We hope it is a useful contribution to the subject.
click below to download, print off and try out!