Canvasback
The Canvasback (Aythya valisineria) is the largest of the North American diving ducks. It ranges from between 48–56 centimetres (19–22 in) long and weighs approximately 862–1,588 grams (1.90–3.50 lb), with a wingspan of 79–89 centimetres (31–35 in). The Canvasback has a distinctive wedge-shaped head and long graceful neck. The adult male (drake) has a black bill, a chestnut red head and neck, a black breast, a grayish back, black rump, and a blackish brown tail.
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| Canvasback |
image source: http://commons.wikimedia.org/wiki/User:Arpingstone
The drake's sides, back, and belly are white with fine vermiculation resembling the weave of a canvas, which gave rise to the bird's common name.The bill is blackish and the legs and feet are bluish-gray. The iris is bright red in the spring, but duller in the winter. The adult female (hen) also has a black bill, a light brown head and neck, grading into a darker brown chest and foreback. The sides, flanks, and back are grayish brown. The bill is blackish and the legs and feet are bluish-gray. Its sloping profile distinguishes it from other ducks.
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| Canvasback |
image source: http://www.flickr.com/photos/black_throated_green_warbler/
