. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds . telltis, dimin. n!cristatus, aresied. Figs. 540, 541, 542.) CrestedAuk. Snub-nosed Auk. Bill fundamentallysmall and simple, compressed-conic, with convexculmen and little sinuate h
. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds . telltis, dimin. n!cristatus, aresied. Figs. 540, 541, 542.) CrestedAuk. Snub-nosed Auk. Bill fundamentallysmall and simple, compressed-conic, with convexculmen and little sinuate horizontal commissure;but in the breeding season developing severalcorneous appendages, which alter its shape great-ly, make it singularly irregular, and modify eventhe outline of the feathers at its base. Theseaccessory pieces are: a nasal plate, filling thenasal fossa, separate from its fellow of the oppo-site side ; a subuasal strip prolonged on the cuttingedge of the upper mandibles backward from the nostrils; a rosette-like plate at base of uppermandible just over angle of the mouth ; a large shoe encasing the posterior part of the undermandible ; the latter single, the other three pieces in pairs, making seven in aU which aremoulted; all these elements vermilion or coral-red; end of the bill enamel-yellow. (Beforeacquiring these growths the young bird is tetraculus of authors; the adult in winter, after. Fig. 540. —Crested Auk, ) (Ad. nat. del.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
