. The birds of Illinois and Wisconsin. Birds; Birds. 470 Field Museum of Natural History — Zoology, Vol. IX. Adult, light phase: Upper parts, bright rufous brown, mixed with dark brown, the centers of the feathers being the latter color; crown. Ferruginous Rough-legged Hawk. and upper back mixed with more or less white; primaries, dark slaty brown, the basal portion of the inner webs, white; under parts, white or buffy white, sometimes almost unmarked but usually showing streaks of rufous brown on the breast; belly heavily barred with dark brown and rufous; thighs, deep rufous brown, barred wi
. The birds of Illinois and Wisconsin. Birds; Birds. 470 Field Museum of Natural History — Zoology, Vol. IX. Adult, light phase: Upper parts, bright rufous brown, mixed with dark brown, the centers of the feathers being the latter color; crown. Ferruginous Rough-legged Hawk. and upper back mixed with more or less white; primaries, dark slaty brown, the basal portion of the inner webs, white; under parts, white or buffy white, sometimes almost unmarked but usually showing streaks of rufous brown on the breast; belly heavily barred with dark brown and rufous; thighs, deep rufous brown, barred with black or dark brown; tail, ashy white below, above pale ashy, shading into white at the base and tip, and more or less edged with rufous brown. Adult, dark phase: General plumage, dark brown; wings and tail similar in marking to the light phase but darker. Immature: Upper parts, dark brown, mixed with tawny and buff; under parts, white, streaked and spotted with dark brown; tail, without bars, the color variable, the greater portion, usually ash gray becoming white at the base. Male: Length, about 22; wing, ; tail, ; tarsus, Female: Length, about 23; wing, to ; tail, ; tarsus, 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 Cory, Charles B. (Charles Barney), 1857-1921. Chicago
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Keywords: ., bookauthorcory, bookcentury1900, bookdecade1900, booksubjectbirds
