. The birds of Illinois and Wisconsin . nder parts, whitish, the breast showing black markings; back, ashygray, the feathers edged with brown on the upper part; shafts ofquills, white; bill, pinkish or reddish or pale white; feet, yellow. The immature bird is similar, but shows no white on the base ofthe bill, or black markings on the breast. Length, 28; wing, 16; bill, 2; tarsus, Jan., 1909. Birds of Illixois and Wisconsin — Cory. 351 This species is much less common than formerly, but still occursin more or less numbers in Illinois and Wisconsin during the migra-tions. Genus BRANTA Sco
. The birds of Illinois and Wisconsin . nder parts, whitish, the breast showing black markings; back, ashygray, the feathers edged with brown on the upper part; shafts ofquills, white; bill, pinkish or reddish or pale white; feet, yellow. The immature bird is similar, but shows no white on the base ofthe bill, or black markings on the breast. Length, 28; wing, 16; bill, 2; tarsus, Jan., 1909. Birds of Illixois and Wisconsin — Cory. 351 This species is much less common than formerly, but still occursin more or less numbers in Illinois and Wisconsin during the migra-tions. Genus BRANTA Scopoli. 71. Branta canadensis (Linn.).Canada Goose. Distr.: Temperate North America, breeding chiefly from the Sas-katchewan and Alberta, Minnesota and North Dakota northward;south in winter from the middle Atlantic coast and Gulf states as faras Jamaica and on the west side from British Columbia to Mexico. Adult: Head and neck, black; a patch of white on the side of thehead behind the eye extending to the chin; back and wings, grayish. Canada Goose. brown; breast and under parts, dull grayish white, becoming whiteon the belly; tail, black. The immature bird is similar, but has the throat and cheekssometimes mottled. Size, large; length, 35 to 44; wing, to 21; tarsus, ; bill, to 352 Field Museum of Natural History — Zoology, Vol. IX. The Canada Goose is common during the migrations in Illinoisand Wisconsin, and once bred in numbers along the upper MississippiValley, but at the present time a few pairs make their nest occasionallyin Michigan and Wisconsin, and possibly a very few in Illinois. Thenest is a mass of sticks on the ground (very rarely in trees). Theeggs are usually 4 to 5, cream white or ivory white in color, andmeasure about x The following varieties or subspecies are recognized. There areapparently no well marked differences to separate them, except thatof size, and, while the extremes are easily recognized, intermediatespec
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