. The birds of Illinois and Wisconsin. Birds; Birds. Female. Mallard Duck. Male. Speculum, purplish blue; no white band on greater wing coverts; head and throat, streaked; throat, not buff; no black spot at base of bill; feet, olive (sometimes red); axillars, white; Eastern North America. Anas rubripes. Black Duck. Dusky Duck. See No. 41. Subfamily FULIGULIN^. Bay and Sea Ducks. Ducks having flap or membraneous lobe on hind toe; tarsus, scutellate (transverse scales) in * GROUP 1. Wing, from 5 to inches long. SECTION 1. Tail feathers, not stiff and pointed. Head, greenish purple,
. The birds of Illinois and Wisconsin. Birds; Birds. Female. Mallard Duck. Male. Speculum, purplish blue; no white band on greater wing coverts; head and throat, streaked; throat, not buff; no black spot at base of bill; feet, olive (sometimes red); axillars, white; Eastern North America. Anas rubripes. Black Duck. Dusky Duck. See No. 41. Subfamily FULIGULIN^. Bay and Sea Ducks. Ducks having flap or membraneous lobe on hind toe; tarsus, scutellate (transverse scales) in * GROUP 1. Wing, from 5 to inches long. SECTION 1. Tail feathers, not stiff and pointed. Head, greenish purple, with white patch (male); head, grayish brown, with white patch (female or immature); no dark stripes on cheek; bill, less than three-fourths inch wide. Charitonetta albeola. Buffle-head Duck. Dipper Duck. See No. 58. SECTION 2. Tail feathers, stiff and pointed. No greenish or purple on head; throat, whitish; cheeks, white or whitish; bill, broad, three-quarters inch or more wide. Erismatura jamaicensis. Ruddy Duck. See No. 66. * For directions for measurement, see page Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cory, Charles B. (Charles Barney), 1857-1921. Chicago
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Keywords: ., bookauthorcory, bookcentury1900, bookdecade1900, booksubjectbirds
