hen, as told by dark eye; brown head; dark bill and back (Zoo; 2008-09-18)
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Ferruginous Duck
Aythya nyroca
Native Range: Eurasia
Notes:
little sexual dimorphism; this diving duck that is chestnut-brown (drake) or darker brown (hen) in plumage all over, except for the bright white undertail coverts; frequents fresh or slow-moving brackish water fringed with vegetation.
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