Anas strepera

f6.7 @ 1/800s, ISO:1000, Nikon D3S w 500mm and 1.7X tele-converter

"Gadwall," Wikipedia, the free encyclopedia.The Gadwall (Anas strepera) is a common and widespread duck of the family Anatidae.The Gadwall is 4656 cm (1822 in) long with a 7890 cm (3135 in) wingspan.The male is slightly larger than the female, weighing on average 990 g (35 oz) against her 850 g (30 oz). The breeding male is patterned grey, with a black rear end, light chestnut wings, and a brilliant white speculum, obvious in flight or at rest.
Lake Myvatn, Iceland