Ce texte décrit les différentes espèces d'oiseaux de proie trouvées en Grande-Bretagne, avec un accent particulier sur les hiboux. Le travail explore leurs habitudes de chasse, leurs caractéristiques physiques et leur rôle dans l’écosystème. Il fournit un aperçu de leur biologie et de leur importance écologique dans l'environnement britannique.
1759 x 1420 px | 29,8 x 24 cm | 11,7 x 9,5 inches | 150dpi
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. Descriptions of the rapacious birds of Great Britain. Birds of prey -- Great Britain; Owls -- Great Britain. OWLS. 335 and depicting, tliem, and connecting the habits of the species with their structure. Instead of misapplying ingenuity by inspecting skins and comparing descriptions, I have commenced the exa- mination of the birds themselves ; but not having been able to procure a sufficient number of exotic species entire or in spirits, I am induced for the present to ex- tend my generic groups. Those which I propose are six. But as the ear is considered an organ of primary importance in the classification of owls, I shall, in the first place, take the liberty of saying a few words re- specting it. In the pheasant, which I select, as a fresh specimen is now lying beside me, and most other birds, the ex- ternal ear is of a roundish form, and of moderate or small size. It presents the appearance of a circular thickened rim covered with skin, slightly elevated above the neighbouring parts, and on its outer edge beset with feathers disposed in a circle, the anterior ones much longer, recurved, and in the ordinary state lying over the aperture of the ear. In the pheasant, the external aperture is two-twelfths and a half in diameter. An irregular cavity exists within this rim, at the bottom of which is a transverse, oblong opening or slit, two- twelfths and a half long, and one-twelfth broad, which is the meatus auditorius externus, analogous to what is vulgarly called the hole of the ear in man. In the pheasant, it is placed at the depth of three-twelfths of an inch, and leads to the membrane of the tympanum, which separates the internal from the external ear.. 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. ]
