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: The birds of Illinois and Wisconsin
: Cory, Charles B. (Charles Barney), 1857-1921
: Birds -- Illinois Birds -- Wisconsin
: American Museum of Natural History Library
: Biodiversity Heritage Library
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from personal observation. Subfamily CYGNIN.^. Swans. During the migrations, swans are found in Illinois and Wisconsin.They are easily recognized by their large size and long necks. Theadults (in the two species which occur in Illinois) are white and theimmature birds, gray. When migrating the flocks assume a V shapedform like the geese. Their food consists of aquatic plants and rootsand occasionally small mollusks. Genus OLOR Wagler. 73. Olor columbianus (Ord).Whistling Swan. Distr.: North America, breeding in high latitudes; south in win-ter to the Carolinas and occasionally to Florida. It is common onthe Gulf coast of Louisiana and Texas and a few occasionally winterin southern Illinois. On the Pacific side it winters from BritishColumbia to southern California, accidental in northern Mexico. Adult: General plumage, white; bill and feet, black; a. small yellowspot (which is not always present) on bare loral skin at the base of Jan., 1909. Birds of Illinois and Wisconsin—Cory. 355
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Whistling Swan. the bill in front of the eye; the distance from the front angle of theeye to the back edge of the nostril is more than the distance from the backedge of the nostril to the end of the bill; this is one of the characters bywhich it may be distinguished from the Trvimpeter Swan, which alsoaverages larger; bill, and feet, black. The immature birds are usually pale, plumbeous gray, with abrownish wash on the head and upper neck; feet, pale yellowish, some-times pale flesh color or grayish. Length, 53; wing, 21.50; bill, 4; tarsus, 4.20. This species is not uncommon in Illinois and Wisconsin during themigrations, being more often observed on the inland waters than onLake Michigan. It grows to a large size, a weight of twenty-fivepounds being not uncommon, and the flesh of the immature birdsis excellent. Its flight is very rapid, much faster than the WildGoose and it is claimed a speed of one hundred miles an hour is notunusual. When flying the flocks assume a V-shaped form.
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