Atlantic Yellow-legged Gull (atlantis)
(last update: October 12, 2011)
Atlantic YLG (atlantis) adult, May 08 2011, Canico - Madeira. Picture: Graham Ekins.
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No black on P4, full sub-terminal band on P5. Mirror on P10, but none on P9. Red spreads only marginally on upper mandible.
Graham's photo comment:
These very dark backed adult gulls approach graelsii Lesser Black-backed Gull in mantle colour. The Azorean birds being the darkest. In this race on the tip of primary 5 there is a large back band on an otherwise paler feather. This is much reduced in Herring Gull.