Monday, 1 November 2010

Lesser Black-backed Gull (Larus fuscus graellsii), ad, 28.10.2010, Aarhus Harbor

This putative Western Lesser Black-backed Gull (Larus fuscus graellsii) is at least a 10th calendar year bird as it has been recorded annually in Aarhus Harbor since 2004 when it was in adult plumage. It's present annually from late summer until late autumn. There is an unread metal ring on its right tarsus and the legs are at maximum only slight yellowish in contrast to other adult Lesser Black-backed Gulls present making it easily identifiable from year to year.

There are photos from August 2004 with yellow legs, September 2005 with pink legs, November 2005 with pink legs, September 2007 with slightly yellowish legs, August 2009 with slightly yellowish legs, September 2009 with slightly yellowish legs, August 2010 with slightly yellowish legs, early September 2010 and late September 2010 with slightly yellowish legs.

Judged only on upper part colors we cannot safely dismiss an intergrade between intermedius and graellsii, but it is much paler than a classical Danish breeding intermedius.

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