. The birds of Illinois and Wisconsin . could be seen with per-fect distinctness and, the writer having previously handled manystuffed specimens, there cannot be the slightest doubt as to the cor-rectness of its identification. Mr. R. M. Anderson records a pairof these birds taken by Mr. Walter G. Savage in Van Buren Cotmty,Iowa, May 25, 1895. (Birds of Iowa, 1907, p. 251.) Genus ARCHIBUTEO Biehm. 163. Archibuteo ferrugineus (Light.).Ferruginous Rough-legged Hawk. Distr.: North America, chiefly w^est of Mississippi Valley, breed-ing from Utah northward; south in winter to Mexico; casually asfa
. The birds of Illinois and Wisconsin . could be seen with per-fect distinctness and, the writer having previously handled manystuffed specimens, there cannot be the slightest doubt as to the cor-rectness of its identification. Mr. R. M. Anderson records a pairof these birds taken by Mr. Walter G. Savage in Van Buren Cotmty,Iowa, May 25, 1895. (Birds of Iowa, 1907, p. 251.) Genus ARCHIBUTEO Biehm. 163. Archibuteo ferrugineus (Light.).Ferruginous Rough-legged Hawk. Distr.: North America, chiefly w^est of Mississippi Valley, breed-ing from Utah northward; south in winter to Mexico; casually asfar east as Illinois. Special characters: Entire front of tarsus thickly feathered. Thisspecies occurs in both light and dark phases of plumage, the formerthe more common; but the feathering of the tarsus and its size aregood diagnostic characters. 470 Field Museum of Natural History — Zoology, Vol. IX. Adult, light phase: Upper parts, bright rufous brown, mixed withdark brown, the centers of the feathers being the latter color; crown.
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidbirdsofillinoisw00cory
