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"Larus heermanni. White-headed Gull. Bill shorter than head or tarsus, rather slender, moderately compressed, the tip rather acute; its color red in part in the adult. Folded wings reaching beyond the tail. Tail of moderate length, even, slightly emarginate in the young. Feet rather large. Tarsus equal to the middle toe and claw. General colors dark; tail mostly blackish. Adult, breeding plumage: Bill bright vermilion red, black for its terminal third, sometimes wholly red; a red ring around eye. Head white; this color gradually merging on the neck into plumbeous-ash, which extends over the whole under parts, being lighter on the abdomen and under tail-coverts than elsewhere. The back is deep plumbeous-slate, lighter on the rump. Upper tail-coverts clearly ashy. Upper surfaces of wings like the back; the primaries black; the tips of all, except the two or three outer ones, narrowly white. Tail black, narrowly tipped with white. Legs and feet reddish-black." Elliot Coues, 1884

White-headed Gull Head

"Larus heermanni. White-headed Gull. Bill shorter than head or tarsus, rather slender, moderately compressed,…