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A. O. U. Check List Adult female Adult male ashy axillars Baltimore Oriole Barn Owl belly bill Birds of Wisconsin Blackburnian Warbler blackish blue bluish Bobolink breeding buffy white Central America chestnut common summer resident Crown and back dark brown Dendroica Distr dull white dusky eggs Family following species Genus grayish brown greenish Hawk hind toe Illinois Illinois and Wisconsin Immature birds inches long inner webs Kumlien and Hollister Lake Koshkonong Lake Michigan Length less white Linn mandible migrations nest North America northern olive green Oologist outer primaries outer tail feathers pale buff Palm Warbler patch plumage rare Ridgway Rough-legged Hawk rufous brown Sandpiper SECTION sides of head south in winter southern Illinois Sparrow specimen speckled spotted streaked with black stripe Subfamily tarsus tawny throat tinged tipped with white upper plumage upper tail coverts Warbler whitish wing bands wing coverts wings and tail Wiscon yellowish