Black-headed gull Larus ridibundus

Identification Tips:

Adult alternate:

Adult basic:

First year:

Similar species:

Bonaparte's Gulls are superficially similar but have dark bills in all plumages and pale undersurfaces to the primaries. First-year Bonaparte's have thinner carpal bars and trailing edges to the wing. Adult Little Gulls have no black on the uppersurface of the wings, dark bills, and have wholly dark underwings. First-year Little Gulls are easily distinguished by the pale trailing edge to the wing and dark bill. Laughing and Franklin's Gulls both have much darker gray backs, never show similar wing patterns and have much thicker, more robust bills. First-year Ring-billed is somewhat similar to first-year Black-headed but lacks the dark ear spot and dark underwings.