Young Horn-billed Auk
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“Ceratorhina monocerata. Unicorn Auk. Horn-bill Auk. Young: Bill like that of adults in winter, lacking horn, but every way weaker, hardly more than half as large. Mostly dark-colored. No white feathers on side of head. White under parts overlaid and marbled with dark-gray ends of the feathers; black of upper parts brownish. The first spring the horn grows, the accessory piece develops, and the plumage clears up. Nestlings are covered with smoky-brown down.” Elliot Coues, 1884
Keywords
birds, ornithology, nocturnal birds, seabirds, North American birds, aquatic feeding birds, Ceratorhina monocerata, Unicorn Auk, Horn-bill AukGalleries
Birds: A-BSource
Elliot Coues Key to North American Birds (Boston, MA: Estes and Lauriat, 1884)
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