. The birds of Illinois and Wisconsin . for about half an inch from the tip. Sexes similar. Adult in fall and vuinter: Upper parts much more brown; underparts whitish or brownish white; breast and sides streaked withbrown. Length, ; wing, ; tail, ; bill, .45. This species is a common migrant in spring and fall in both Il-linois and Wisconsin. Frequents open fields and prairies, usuallyin flocks. A few remain in southern Illinois in winter. 68o Field Museum of Natural History-—Zoology, Vol. IX. Family MIMID^. Thrashers, Mocking-birds, etc. The members of the family Mmiidas are, as a
. The birds of Illinois and Wisconsin . for about half an inch from the tip. Sexes similar. Adult in fall and vuinter: Upper parts much more brown; underparts whitish or brownish white; breast and sides streaked withbrown. Length, ; wing, ; tail, ; bill, .45. This species is a common migrant in spring and fall in both Il-linois and Wisconsin. Frequents open fields and prairies, usuallyin flocks. A few remain in southern Illinois in winter. 68o Field Museum of Natural History-—Zoology, Vol. IX. Family MIMID^. Thrashers, Mocking-birds, etc. The members of the family Mmiidas are, as a rule, gifted vocalists,the Mockingbird being perhaps the most prominent on account ofits familiarity to most observers. They are wood-loving insectiv-orous birds, although often seen in the open. Genus MIMUS Boie. 339. Mimus polyglottos (Linn.). Mockingbird. Distr.: Southern United States and northern Mexico, from Mary-land, Kentucky, southern Illinois, and Kansas southward and cas-ually farther north, breeding throughout its Adult: Upper parts, gray; under parts, white, tinged on breast andsides with pale gray; primary coverts and basal portion of primaries,white, forming a conspicuous white wing patch; middle tail feathers,brownish black; outer tail feathers, mostly white. Sexes similar. Immature: Upper plumage, grayish brown; under parts, white;breast spotted with dusky; wings and tail as in the adult. Length, about ; wing, ; tail, ; bill, .65. Jan., 1909. Birds of Illinois and Wisconsin — Cory. 681 The Mockingbird, so widely celebrated for its vocal accomplish-ments, is a common summer resident in portions of southern Illinois,but quite rare in northern Illinois and southern Wisconsin, althoughMr. E. W. Nelson states: Dr. Hoy has recorded six nests obtainedin the vicinity of Racine, Wisconsin. (Birds of N. E. TIL, 1876,p. 94.) Mr. Ridgway found it common in the vicinity of Olney,southern Illinois, and Mr. H. S. Swarth found a pair breeding at Joliet
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