Ce travail propose des descriptions des oiseaux prédateurs en Grande-Bretagne, en se concentrant particulièrement sur des espèces telles que les aigles, les faucons et les hiboux, et leur anatomie, leur comportement, et les rôles écologiques dans l'environnement britannique.
1999 x 1251 px | 33,8 x 21,2 cm | 13,3 x 8,3 inches | 150dpi
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. Descriptions of the rapacious birds of Great Britain. Birds of prey -- Great Britain; Owls -- Great Britain. 336 strigintE. Beyond this membrane it is not our business at present to penetrate. In the eagles and hawks generally, the structure is similar, the form of the external aperture varying from oblong to circular. Thus, in the peregrine falcon and sparrow hawk, the same parts are seen, the external rim being merely thinner. Among ^^^ these birds, however, there is a group ^^J^^ ^^^ which exhibits a decided diflFerence /^TTcN. in the appearance of the parts. The common har- rier, Circus cyaneus, which presents so great a re- semblance to the owls, as already mentioned, has the external ear of an oblong form, and very large size, compared with that of other hawks. It is about half. an inch in length, and beset round the thin edges with slender recurved feathers. It is divided in a manner longitudinally into two portions by a process of the oc- cipital bone covered with skin, its anterior part being sunk, and exhibiting a longitudinal slit four-twelfths of an inch long, which is the opening of the meatus. From its inferior margin proceeds downwards and for- wards to the base of the lower jaw a narrow curved space of bare skin, more than half an inch long; along. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Macgillivray, William, 1796-1852. Edinburgh, Maclachlan & Stewart; [etc. , etc. ]
