. 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 . I. <? ^^x Fig. 503. — The nest of the Cnrmorant (P. bicristatus). (Designed by H. W. Elliot.) PHALA CBOCOBA CID^: CORMORANTS. 725 long filamentous feathers (considered by Nitzsc
. 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 . I. <? ^^x Fig. 503. — The nest of the Cnrmorant (P. bicristatus). (Designed by H. W. Elliot.) PHALA CBOCOBA CID^: CORMORANTS. 725 long filamentous feathers (considered by Nitzsch filoplumaceous), on the head and neck, andeven, iu some cases, on the upper and under parts too. These feathers are commonly white, as. Fig. 505. —Skull of Phalacrocorax hicriatatxis, showing sfo. occipitnl style or iiuolial hone; nat. size,nature by Dr. R. W. Sliufeldt. The style is somewhat tilted ui)ward from its natural position.) (From 726 SYSTEMATIC SYNOPSIS. — STE G AN OP ODES. especially considering the shape of the poucl^the skin is usually brightly colored, and some-times carunculate. The eyes, as a rule, are green — a color not common among birds. Thesebirds are highly psilopsedio as well as altricial; the young are for some time blind, naked, andperfectly helpless. Twenty-five species of Cormorants may be considered established. Their study is diilicDlt,owing to the great changes in plumage, the high normal variability in size, and their closeinter-relation, which is such that the single genus Graculus does not appear capable of well-founded division. Species are found all over the world, excepting the uttermost polar regions,and are usually very abundant in individuals; they are all very much alike
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
