. 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. Birds; Birds. FALG0NID2E— CIRCINJE: HABBIERS. 521. Fig. 364. — Ear-parts of Circns. (After Macgillivray.) 42. Subfamily CIRCIN/E: Harriers. Face surrounded with an incomplete ruff (
. 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. Birds; Birds. FALG0NID2E— CIRCINJE: HABBIERS. 521. Fig. 364. — Ear-parts of Circns. (After Macgillivray.) 42. Subfamily CIRCIN/E: Harriers. Face surrounded with an incomplete ruff (as in most owls) ; orifice of ear about as large as the eye, and in some cases at least with a decided conch (fig. 364). Bill rather weak, not toothed or notched. Legs lengthened, the tarsus approximately equalling the tibia in length (as in AcdpitrintB). Wings and tail lengthened. Form light and lithe; plumage loose; general organization of the buteonine rather than of the falconine division of the family. Thus, the scapular process of the coracoid is not produced to the clavicle; there is no median ridge on the palate anteriorly; the septum nasi is less complete than in Fdleo, and the nostrils are not circular with a central tubercle. The harriers constitute a small group, of the single genus Circus and its subdivisions (to which some add the African Polyboroides), containing some 15 or 20 species of various parts of the world. 171. CIR'CUS. (Gt. KipKos, hirlms, Lat. circus, a kind of hawk; from its ckcling in the air. Fig. 364.) Harriers. BiU thickly beset with many curved radiating bristles surpassing in length the cere, which is large and tumid ; tomia lobed or festooned, but neither toothed nor notched. Nostrils ovate-oblong, nearly horizontal. Superciliary shield prominent. Tarsus long and slender, scutellate before and mostly so behind, reticulate laterally; toes slender, the middle with its claw much shorter than the tarsus ; a basal web between the outer and middl
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1894
