16 March 2009

2d w Herring gull (L. argentatus). 17-1-09

2nd winter Herring gull (Larus argentatus). 17-1-09. This age stage can be the most difficult to separate from michahellis. Subjective features such as head, bill and body structure, primary projection and grey tone can be very useful. In this individual, the lack of black around the eye or the bicoloured bill can also help. Covert pattern is tricky to be used in this age stage.

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