. La clé pour les oiseaux nord-américains. Contenant un compte rendu concis de toutes les espèces d'oiseaux vivants et fossiles à l'heure actuelle connues du continent au nord de la frontière mexicaine et des États-Unis, y compris le Groenland et la Basse-Californie, avec lesquelles sont incorporées l'ornithologie générale: Un aperçu de la structure et la classification des oiseaux; et l'ornithologie de terrain, un manuel de collecte, de préparation et de conservation des oiseaux . .) Bleu, corneilles. Bill de forme particulière, avec des ponceaux presque droits montant sur le front, ainsi quelque-que comme dans SiurneUa, betweenthe proéminent et quelque chose whatantrorse antise, qui, comment

• Contributeur: Reading Room 2020 / Alamy Banque D'Images
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. 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 . .) Blue, Crows. Bill of peculiar shape, with nearly straight culmen mounting on forehead, thus some-what as in SiurneUa, betweenthe prominent and somewhatantrorse antise, which, how-over, do not hide the nostrils;slender, tapering, acute, notnotched; gonys straightish, scarcely ascending. Nostrilssmall, oval, entirely exposed.Tail nearly square, muchshorter than wings. Wingslong, pointed, folding nearlyto end of tail; 4th primarylongest, 3d and 5th scarcely Fig. 271. —Blue Crow, nat. size; ouIiulu too convex. (Ad iiat. del. E.C.)shorter; 2d shorter, 1st shorter still. Feet stout, indicating somewhat terrestrial habits; tar-sus longer than middle toe without claw, the envelope subdivided behind towards the bottom.Claws all large, strong, and much curved. Color bluish, nearly uniform: sexes alike. Onespecies. G. cyanocephala. (Gr. xiavos, huanos^ blue ; KK^aKrj, Itephale, head. Fig. 271.) BlueCkow. $ : Dull blue, very variable in intensity, nearly uniform, but brightest on head, fading-. COB VIBJE — GARB ULIN^: J A YS. 419 on belly; the throat with whitish streaks; wings dusky on the inner webs. Bill and feetblack. Iris brown. Length 11.00-12.00; extent. 16.50-19.00; wing 5.50-6.00; tail about4.50 ; bill 1.33, but from 1.25-1.50; 9 smaller, duller. Kocky Mt. region ; much the sameelevated distribution as the last, but apparently rather more southerly ; decidedly gregarious, and very abundant in some places. A remarkable bird, combining the form of a crow withthe color and habits of a jay, and a peculiarly shaped bill. It roves about in noisy restlessflock

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• bookdecade1890
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