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"Simorhynchus cristatellus. Crested Auk. Snub-nosed Auk. Bill fundamentally small and simple, compressed-conic, with convex culmen and little sinuate horizontal commissure; but in the breeding season developing several corneous appendages, which alter its shape greatly, make it singularly irregular, and modify even the outline of the feathers at its base. These accessory pieces are: a nasal plate, filling the nasal fossa, separate from its fellow of the opposite side; a subnasal strip prolonged on the cutting edge of the upper mandibles backwards from the nostrils; a rosette-like plate at base of upper mandible just over angle of the mouth; a large shoe encasing the posterior part of the under mandible; the latter single, the other three pieces in pairs, making seven in all which are moulted; all these elements vermilion or coral-red; end of the bill enamel-yellow. (Before acquiring these growths the young bird is tetraculus of authors; the adult in winter, after shedding the, is dubius.)" Elliot Coues, 1884

Crested Auk in Summer

"Simorhynchus cristatellus. Crested Auk. Snub-nosed Auk. Bill fundamentally small and simple, compressed-conic,…

"Simorhynchus cristatellus. Crested Auk. Snub-nosed Auk. A beautiful crest of 12-20 slender feathers springing from the forehead, curling over forward in arc of a circle to fall gracefully upon the bill; this helmet is blackish; at full length about 2 inches long; the feathers are not filamentous, but have well formed webs, and are bundled or impacted together, owning to the oblique divergence of the webs from the shaft, as in the genus Laphortyx. A slender series of white filamentous feathers over and behind each eye, drooping downwards and backwards." Elliot Coues, 1884

Crested Auk in Winter

"Simorhynchus cristatellus. Crested Auk. Snub-nosed Auk. A beautiful crest of 12-20 slender feathers…

"Simorhynchus cristatellus. Crested Auk. Snub-nosed Auk. The whole plumage otherwise sooty - more brownish-black above, more brownish-gray below. Feet bluish, with dark webs. Aside the transformation of the bill, the young differ in lacking the crest and white filaments; but both are early acquired; there is a white spot below eye. The summer and winter plumages are alike. Iris said to be in winter white, in summer with a blackish outer and bluish inner ring; in the young, brown." Elliot Coues, 1884

Crested Auk

"Simorhynchus cristatellus. Crested Auk. Snub-nosed Auk. The whole plumage otherwise sooty - more brownish-black…