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"Buteo borealis. Red-tailed Buzzard. "Hen Hawk". Upper surface of tail rich chestnut, with white tip and usually a black subterminal zone, with or without other narrower and more or less imperfect black bars; sometimes barred throughout. From below, the tail appears pearly whitish with a reddish tinge, wither quite uniform, or barred throughout with the whitish and blackish. In general, it is the female with the most barred or completely barred tail, the male with the uniform tail, only subterminally once-zoned. Upper parts blackish-brown, with a thoroughly indeterminate amount of light variegation, gray, fulvous, and whitish; feathers of hind head and nape with cottony white bases, showing when disturbed; those of hind neck usually with fulvous edging; of scapular region showing most variegation with tawny or whitish, or both, the scapulars and adjoining feathers being largely barred, and only blackish on their exposed portions; upper tail-coverts showing much tawny and white. Ground color of under parts white, more or less buff-toned, the dark color of the upper parts reaching nearly or quite around the throat, the flanks and lower belly heavily marked with dark brown or blackish, but a large pectoral area, with the tibiae and crissum, mostly free from markings, as a rule; but no description will cover the latitude of coloration. Primaries blackening on their exposed portions, for the rest lighter grayish-brown, dark-barred across both webs, and extensively white-areated on inner webs basally." Elliot Coues, 1884

Red-tailed Buzzard

"Buteo borealis. Red-tailed Buzzard. "Hen Hawk". Upper surface of tail rich chestnut, with white tip…