Horn-billed Auk in Summer

“Ceratorhina monocerata. Unicorn Auk. Horn-bill Auk. Adults in summer: Bill orange-yellow. Culmen and base of upper mandible dusky; feet some yellow color, the tarsi behind and the soles blackish; claws black. The sharp feathers of the head white, about an inch long. Entire upper parts glossy blue-black; a line of white along edge of forearm. Sides of head and neck, of body along under the wings, with chin, throat, and fore-breast, clear grayish-ash, or pale bluish-gray; under parts from breast pure white, shading insensibly into the color of the sides and flanks. Inner webs of wing- and tail-feathers grayish-brown, paler toward base, the shafts of the primaries dull whitish at base.” Elliot Coues, 1884

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