Varying, from individuals distinguishable from the darker examples of var. borealis only by the presence of bars on the tibiæ and crissum, through others with various degrees of rufous tinge and dusky spotting and barring beneath, to a perfectly melanistic condition, in which the bird is almost uniformly black, and the tail with continuous, regular bars of black to the base. Hab. Western Province of North America, from the Rocky Mountains to the Pacific … var. calurus.
6. B. harlani. Wing, 15.00–16.20; tail, 8.80–10.50; culmen, 1.00; tarsus, 2.75–2.90; middle toe, 1.50–1.70. Lateral toes nearly equal; tibial plumes much developed, reaching below the bases of the toes. Entirely brownish-black (except the tail), the concealed bases of the feathers snowy-white. Adult. Tail confusedly mottled with dusky and white, upon a grayish ground; sometimes more or less tinged with rufous. Young. Tail grayish-brown, with nine very regular, sharply defined bands of brownish-black, about equal in width to the gray ones. Lower parts wholly dusky. Hab. Southwestern United States, east of the Rocky Mountains, from Kansas to Texas.
7. B. cooperi. Wing, 15.75; tail, 9.10; culmen, 1.10; tarsus, 3.25; middle toe, 1.70. Adult. Head, neck, and beneath, pure white, the head above and nape streaked with dusky; lining of the wing white, with a large black patch. Above nearly uniform dusky, the primaries plumbeous. Tail longitudinally mottled with light rufous, cinereous, and dusky; the former prevailing. Hab. Santa Clara County, California.
Buteo pennsylvanicus (Wils.).
BROAD-WINGED HAWK.
Falco pennsylvanicus, Wils. Am. Orn. VI, 92, pl. liv, f. 1, 1812.—Lath. Gen. Hist. I, 263, 1821.—Aud. B. Am. pl. xci, 1831; Orn. Biog. I, 461, 1831.—Bonap. Ann. Lyc. N. Y. II, 29, 434; Isis, p. 1137, 1832.—Nutt. Man. I, 105, 1833.—Temm. Pl. Col. 67, 1836. Buteo pennsylvanicus, Bonap. Ois. Cuv. Règ. An. p. 35, 1830; Eur. & N. Am. B. p. 3, 1838; Consp. Av. p. 19, 1850.—Aud. Syn. p. 7, 1839.—Brew. (Wils). Am. Orn. Syn. p. 648, 1852.—Gray, Gen. sp. 8, 1844; List B. Brit. Mus. p. 16, 1844.—Cass. B. Cal. & Tex. Syn. p. 100, 1854.—Strickl. Orn. Syn. I, 32, 1855.—De Kay, Zoöl. N. Y. II, 11, pl. v, fig. 11, 1844.—Cass. Birds N. Am. 29, 1858.—Gray, Hand List, B. 7, 1869.—Dresser, Ibis, 1865, 325 (Texas). Astur pennsylvanicus, Cuv. Règ. An. (ed. 2), I, 332, 1829.—James. (Wils.) Orn. I, 65. Falco latissimus, Wils. Am. Orn. (last ed.) VI, 92, pl. liv, f. 1, 1812. A. ? latissimus, Jard. (Wils.) Am. Orn. II, 294. Falco wilsoni, Bonap. Obs. Wils. Nouv. Journ. Ac. Sc. N. Y. III, 348. Pœcilopternis wilsoni, Kaup, Mon. Fal. Cont. Orn. p. 75, 1850. Sparvius platypterus, Vieill. Enc. Méth. III, 1273 (quot. Wils. pl. liv, fig. 1), 1823.
Sp. Char. Adult. Upper surface dark umber-brown, the feathers gradually paler toward edges; on the back, the feathers more uniformly dusky, causing a prevalent blackish appearance. Rump and upper tail-coverts blackish vandyke-brown; the latter tipped with pure white, and with a concealed bar of same, about the middle of each feather. Tail dull black, with an obscure terminal band of dull brown, this fading terminally into whitish; across the middle of the tail a broad band of dull light umber (in some individuals approaching dull white) about ¾ of an inch in width; about as far anterior to the main band as this is from the tip is another much narrower and more obscure band of the same color, crossing just beyond the ends of the coverts, or concealed by them. Primaries uniform brownish-black, fading on terminal edge into pale brown. Head above, and broad but inconspicuous “mustache,” running from beneath the lore downward across the cheek, dull black; the crown posteriorly, with the occiput and nape, having the dull black much broken, caused by the lateral streaks of dull rufous on all the feathers; this dull rufous tint prevails on the rest of the head and neck, as well as the breast, leaving the lores and chin and lateral portion of frontlet alone whitish; throat streaked with blackish. Beneath dull brownish-rufous; that of the breast almost unvaried; medially, however, are roundish spots of white on opposite webs, but these are not confluent; posteriorly these spots become gradually more numerous and more transverse, forming on the flanks transverse bands, almost continuous; on the tibiæ the white prevails, the rufous bars being more distant, and connected only by a brown shaft-line; lower tail-coverts less numerous, transverse spots of dull rufous. Lining of the wing ochraceous-white, with sparse, rather small, irregularly deltoid spots of dull rufous; under surface of the primaries unvaried white, as far as their emargination, beyond which they are black. Fourth quill longest; third a little shorter; second intermediate between fifth and sixth; first about equal to the ninth. Female (extremes 30,969, Brookline, Mass., and 30,895, Mirador, Mexico; the latter the larger.) Wing, 11.00–11.30; tail, 6.80–7.10;
tarsus, 2.30; middle toe, 1.30. Male (32,309, Moose Factory, Hudson’s Bay Territory). Wing, 10.50; tail, 6.30; tarsus, 2.30; middle toe, 1.20.
Young male, second year? (39,106, Remedios, Cuba, June; N. H. Bishop). Upper parts similar to adult, but a reddish tint appreciably washing the edges of the interscapulars and (less noticeably so) the scapulars. Bands on tail nearly as in adult; but very near the base is a fourth, very narrow and faintly defined, pale band, while the bases of all the feathers are much mottled with white. Dull rufous of the breast not continuous, but in the form of large longitudinal broad spots, occupying the greater middle portion of each feather; abdomen, sides, and tibiæ with smaller and more cordate spots of dull rufous; the lower tail-coverts immaculate; the decided ochraceous tinge beneath, deepest posteriorly.
Young, first year (11,984, Washington, D. C.). The blackish above is much variegated, being broken by the narrow rusty borders to interscapulars, rump, and lesser wing-coverts; the broader and more ochraceous borders to scapulars and greater wing-coverts, and partially concealed whitish spotting on the former. Upper tail-coverts white, with broad bars of blackish-brown; secondaries and primaries edged terminally with whitish. Tail dull umber-brown, growing darker terminally; narrowly tipped with white, and crossed with six obscure, narrow bands of dusky, the (concealed) bases of all the feathers white. Superciliary region, cheeks, chin, throat, and entire lower parts, delicate pale ochraceous, or whitish cream-color; a conspicuous “mustache,” a medial longitudinal series of streaks on the throat, with large longitudinal ovate spots on sides of breast, cordate spots on sides and flanks, and sagittate spots on tibiæ, clear blackish-brown. The ochraceous deepest on the abdomen and crissum. Wing beneath as in adult.