Bonaparte's gull Larus philadelphia

Identification Tips:

Adult alternate:

Adult basic:

Juvenile/First year:

Similar species:

Adult Little Gulls have no black on the uppersurface of the wings and have wholly dark underwings. First-year Little Gulls are easily distinguished by the pale trailing edge to the wing, but also have wider, bolder carpal bars. Black-headed Gulls are superficially similar but have pale bills in all plumages and dark undersufaces to the primaries. Laughing and Franklin's Gulls both have much darker gray backs, never show similar wing patterns and have much thicker, more robust bills