The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . neck, which is chiefly found in salt water; the Red-headed Pochard (^./«•?««, Lin.), ash-coloured, with rufous head and neck, and black breast, nearly allied to which, but larger, is the celebrated Ame-rican Canvass-back (A. valisneria, Wilson); and the Tufted Pochard (A. fuUgula, Lin.; F. cristata, Auct.),purple-black, with pendent occipital crest, and white flanks and belly. A fourth, the Wliite-eyed Pochard(A. nyroca, Gm.), is not common, and is distinguis
The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . neck, which is chiefly found in salt water; the Red-headed Pochard (^./«•?««, Lin.), ash-coloured, with rufous head and neck, and black breast, nearly allied to which, but larger, is the celebrated Ame-rican Canvass-back (A. valisneria, Wilson); and the Tufted Pochard (A. fuUgula, Lin.; F. cristata, Auct.),purple-black, with pendent occipital crest, and white flanks and belly. A fourth, the Wliite-eyed Pochard(A. nyroca, Gm.), is not common, and is distinguished by its maronne head and neck, the latter encircled with ablack collar, and a white spot on the chin. A fifth, the Red-crested Pochard (A. riiftna, Lin.), is larger than anyof the foregoing (except the American), with elongated, bright ferrugineous, coronal feathers, and the rest mostlydark: this bird belongs properly to Asia, and is only known as a straggler so far west. Lastly, the Pied Pochard(An. Stelleri and dispar), with plumage not unlike that of an Eider, another native of eastern Asia, has likewise PALMIPEDES. 265. Kig. 131.—Sternum of Tesl. been killed here. Most of these birds are very fine eating-, the Scaup least so, and feed (excepting that s; ecies)principally on vegetable diet. Their coeca are largfer than in nearly .ill of the foregoing.] The Ducks of our second division, wherein the back toe is not bordered by a membrane, have amore slender head, the feet less broad, the neck not so long, the bill more even, the body not so thick: they walk better, and feed on aquatic plants and seeds, as well ason animal diet, [as indeed do also the preceding, though generallyto a less extent]. It appears that their tracheal labyrinths con-sist of a homogeneous bony and cartilaginous substance, [whichforms a simple vesicle. They all moult twice in the year, themales attaining, by actual change of feather about midsummer, agarb more or less similar to that of the fem
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Keywords: ., bookcentury1800, bookdecade1840, booksubjecta, booksubjectzoology
