. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande valley . sneria, p. 57. 2. Crown reddish brown americana, p. 56. 1. Head and neck greenish or purplish black. 2. Head glossed with green luarila, p. 57. 2. Head glossed with purple. o. Neck without chestnut collar affinis, p. 58. 3. Neck with dark chestnut collar collaris, p. 59. 146. Aythya americana {Eyt.). Redhead. Bill little more than twice as long as wide. Adult male: whole head and neck bright reddishchestnut ; shoulders andchest black ; belly white ;sides and b
. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande valley . sneria, p. 57. 2. Crown reddish brown americana, p. 56. 1. Head and neck greenish or purplish black. 2. Head glossed with green luarila, p. 57. 2. Head glossed with purple. o. Neck without chestnut collar affinis, p. 58. 3. Neck with dark chestnut collar collaris, p. 59. 146. Aythya americana {Eyt.). Redhead. Bill little more than twice as long as wide. Adult male: whole head and neck bright reddishchestnut ; shoulders andchest black ; belly white ;sides and back uniformgray, with fine lines of blackand ashy ; tail and feathersaround base black. Adultfemale: plumage dull gray-ish brown except for whit-ish chin, throat, and : 17-21, wing , bill , widthof bill . Distribution.—Nearly thewhole of North America,breeding from California,Missouri, and Maine, north-ward. Not reported fromFig. 72. Alaska. Nest. — On marshy orgrassy ground near water, loosely constructed of grass and weeds, and linedwith down. Eggs : 7 to 10, grayish white or pale DUCKS, GEESE, AND SWANS 57 The redhead is so similar to the canvas-back as to be easily mis-taken for it at a little distance, and in habits the rcsembhuice isequally close. Goss says that this deep water duck, though widelydistributed, is not so common on the Pacific slope as east of theRocky Mountains. It is usually found in flocks on the open waterassociated with canvas-backs, and diving with them for its food,which consists of various kinds of submarine and fresh water plants,small mollusks, crustaceans, fish, frogs, and water newts. 147. Aythya vallisneria ( Wils.). Canvas-back. Bill three times as long- as wide. Adult male: head and neck rich chestnut brown, becoming-dusky on crown and face ;shoidders and chest black ;sides and back liglit gray ;belly white or grayish ; tailand quills dark gray ; feath-ers around base of tail female:
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