. 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 . o blackish on lower back, rump, tail, belly, sides of body and lining of wings; flanksand crissum mostly white. Length about ; extent ; wing ;tail ; b
. 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 . o blackish on lower back, rump, tail, belly, sides of body and lining of wings; flanksand crissum mostly white. Length about ; extent ; wing ;tail ; bill along gape ; tarsus S. and C. Am. and Mex. to Texas, abundantfrom April to October on the Rio Grande, where called cornfield duck; a common market-bird in some places. Nest in hollows of trees, often at a great distance from water, to whichthe young are transported by the parents in the bill. Eggs 12-16, X , of usual duckshape, buffy-white. 67. Subfamily ANATIN/E: River Ducks. Tarsi scutellate in front; hind toe simple (in FuUguliMce, the hind toe with a flap orlobe.) This expression separates the present group from all the North American examplesof the foregoing and succeeding subfamilies, although it is not a perfect diagnosis. The neckand legs are shorter than they average in geese, while the feet are smaller than in the sea- 690 SYSTEM A TIC SYNOPSIS. — LAMELLIROSTBES—AN ducks, the toes and their webs not being so higlily developed. None of the AnatiruB areextensively maritime, like most of the Fuligulinm; yet they are by no means confined tofresh waters, and some species constantly associate with the seaducks. They feed exten-sively, like most geese, upon succulent aquatic herbage, but also upon various animalsubstances; their flesh is almost without exception excellent. They do not dive for theirfood. The moult is double; the sexes are almost invariably markedly distinct in color; the young resemble the ally a brilliant speculum,which, l
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
