Sexual dimorphism I

Sexual dimorphism I
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Mareca strepera (L.) Gadwall
A pair; male (drake) on the left.
Canada, Ontario, Toronto.
12/20/2015
AN033'03-151220023'JJK
All from this album
Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I Sexual dimorphism I