Editing Canvasback (section)

==Description==
It ranges from {{convert|48|–|56|cm|in|abbr=on}} in length and weighs {{convert|862|–|1588|g|lb|abbr=on}}, with a wingspan of {{convert|79|–|89|cm|in|abbr=on}}.<ref>{{Cite web |title=Canvasback Identification, All About Birds, Cornell Lab of Ornithology |url=https://www.allaboutbirds.org/guide/Canvasback/id |access-date=2025-02-06 |website=www.allaboutbirds.org |language=en}}</ref> It is the largest species in the genus ''[[Aythya]]'',{{Citation needed|date=February 2025}} and the largest diving duck in North America.<ref>{{Cite web |title=Canvasback |url=https://abcbirds.org/bird/canvasback/ |access-date=6 February 2025 |website=American Bird Conservancy}}</ref> Canvasbacks are similar in size to a [[mallard]] but with a heavier and more compact build. 191 males wintering in western [[New York (state)|New York]] averaged {{convert|1252|g|lb|abbr=on}} and 54 females there averaged {{convert|1154|g|lb|abbr=on}}.<ref name = "CRC">''CRC Handbook of Avian Body Masses, 2nd Edition'' by John B. Dunning Jr. (Editor). CRC Press (2008), {{ISBN|978-1-4200-6444-5}}.</ref> 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. 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.<ref name=DUCB>{{cite web |url=http://www.ducks.org/hunting/waterfowl-id/canvasback |title=Canvasback |publisher=[[Ducks Unlimited]] |access-date = 23 November 2009}}</ref> The bill is blackish and the legs and feet are bluish-gray. The [[Iris (anatomy)|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.<ref name="DUCB"/>