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Anas strepera Linnaeus, 1758
The gadwall is 46–56 cm (18–22 in) long with a 78–90 cm (31–35 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. In non-breeding (eclipse) plumage, the drake looks more like the female, but retains the male wing pattern, and is usually greyer above and has less orange on the bill.
The gadwall breeds in the northern areas of Europe and Asia, and central North America.
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