. The birds of Illinois and Wisconsin . mage, black, no white on the iving; head,black, with a white patch on the forehead and nape; feathers on the hill, less than one-halfinch from the nostril. A peculiar highlycolored bill is one ofthe distinguishingmarks of the male ofthis species, it beingorange, yellow, black,and white, the featherson the top of the bill extending much farther forward than on thesides. Female and immature: Brownish, showing a whitish spot at thebase of the bill, and back of the eyes; the female having the upperparts, brownish; under parts, ashy gray, shading into whitish
. The birds of Illinois and Wisconsin . mage, black, no white on the iving; head,black, with a white patch on the forehead and nape; feathers on the hill, less than one-halfinch from the nostril. A peculiar highlycolored bill is one ofthe distinguishingmarks of the male ofthis species, it beingorange, yellow, black,and white, the featherson the top of the bill extending much farther forward than on thesides. Female and immature: Brownish, showing a whitish spot at thebase of the bill, and back of the eyes; the female having the upperparts, brownish; under parts, ashy gray, shading into whitish on thebelly. Length, ; wing, ; tarsus, ; bill (culmen), ;side measure, This species may always be distinguished from O. americana bythe forward extension of the feathers on the top of the bill, and from0. deglandi by the absence of the white wing patch. Abundant on Lake Michigan in fall and winter, and in many of theinterior waters of Wisconsin and Illinois until ice forms. Leaves forthe north the last of 346 Field Museum of Natural History — Zoology, Vol. IX.
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidbirdsofillinoisw00cory
