. Key to North American birds [microform] : 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. Birds; Ornithology; Oiseaux; Ornithologie. STKdANOI'ODKS, TOril'ALMATn IIIISDS. â 2!t7. TliU is a (loilnito uiul perfectly iriUinil jirou)), wlilcli will lie immoiliately rceo^;- iiized liy the fore;-;iu|)leli' weMiiiiL; (if tlio Imlliix, is not elsewhere observed ainonjJ! hinls. It is represented hy six geiieni, nil North Anierican, eaeh the lyi)0 of a family. The nature is altrieial thron!j;hot
. Key to North American birds [microform] : 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. Birds; Ornithology; Oiseaux; Ornithologie. STKdANOI'ODKS, TOril'ALMATn IIIISDS. â 2!t7. TliU is a (loilnito uiul perfectly iriUinil jirou)), wlilcli will lie immoiliately rceo^;- iiized liy the fore;-;iu|)leli' weMiiiiL; (if tlio Imlliix, is not elsewhere observed ainonjJ! hinls. It is represented hy six geiieni, nil North Anierican, eaeh the lyi)0 of a family. The nature is altrieial thron!j;hotit the order. The ejiiLfs are very few, freijinMitly only one, nsually if not always plain-colored, and encrnsted with a peculiar white chalky snhstancc ; they are depositeil in a rnde Imlky nest on the j^roinid, on rocky lcdij,'es, or on low trees and hushes in the vicinity of water. The dieteli(! rcLfinion is exclusively carnivorous, the fooil liciiif^ chielly fish, sometimes pursued under water, sometimes plnn<fe(l after, sometimes scooped up. In accordance with this, we lind the alimentary canal to consist of a capacious (listensililc (eso|)hae provcntriculus with numerous solvent glands, a small and very moderately muscular "gizzard, rather lon'⢠the external nostrils is a curious and unex|)lained feature ; they a|)i)ear to he open at first, and in acme species, like the tropic-bird, they remain so; but tliey are gener- ally completely obliterated in the adult state. There are probably no intrinsic syringeal muscles in any birds of this order. JJut the most notable fact, in connec- tion with the respiratory system is the extraordinary pneumaticity of tiie body, â which reaches its height in the pelicans and gannets; it is described liy Xitzsch sul)stantially as foliinvs: The interior air receptacles are of an ordinary character, but the anterior oi' these cells are more subdivided than usual; from them, the air gets under the skin through the axillary cavities
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbirds, bookyear1872
