. The birds of Illinois and Wisconsin . Screech onc-qiiartcr natural size. in intensity arid at times somewhat resembling the cry made by a catwhen expressing his disapprobation of a rival. Taken when youngthey are easily tamed and made amusing pets. The eggs are deposited in holes in trees. They are pure white,four to six in number, and measure about x inches. Nidifi-cation usually commences in April. Genus BUBO Dumeril. 181. Bubo virginianus (Gmel.).Great Horned Owl. Distr.: Eastern North America, north to Labrador; breedsthroughout its range. Adult: Ear tufts, large; gen
. The birds of Illinois and Wisconsin . Screech onc-qiiartcr natural size. in intensity arid at times somewhat resembling the cry made by a catwhen expressing his disapprobation of a rival. Taken when youngthey are easily tamed and made amusing pets. The eggs are deposited in holes in trees. They are pure white,four to six in number, and measure about x inches. Nidifi-cation usually commences in April. Genus BUBO Dumeril. 181. Bubo virginianus (Gmel.).Great Horned Owl. Distr.: Eastern North America, north to Labrador; breedsthroughout its range. Adult: Ear tufts, large; general plumage, mixed tawny black andwhite, the tawny color predominating; a white patch on the throat. The Conspicuous ear tufts and coloration will always distinguish itfrom our other large owls, and its size from the smaller species. Length, about 23; wing, to 16; tail, about 9. 496 Field Museum of Natural History — Zoology, Vol. Great Horned OwL The Great Horned Owl is rather common throughout heavilywooded portions of Illinois and Wisconsin. Formerly quite commonin the vicinity of Chicago, but now rare. It breeds in suitable local-ities in both states. The hoot is usually a loud hoo-hoo, hoo-hoo,hoo, shorter and deeper toned than that of the Barred Owl. It alsoutters a varietv of unearthly screams. Mr. Woodruff (Birds of the Chicago Area) states that in 1890Mr. Ned Pratt collected several sets of the eggs of this owl near LakeForest, a short distance north of Chicago. Kumlien and Hollister (Birds of Wisconsin) state that it breedsas early as the middle of February and is usually more plenty inthe hardwood timber of bottom lands along streams. Nests in a hollow tree or in an old hawks, crows, or squirrelsnest. The eggs are white, from two to three in number, and measureabout X inches. Nidification begins in February or early inMarch. Eggs have been taken as early as February first. The FieldMuseum c
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