Bufflehead (Bucephala albeola) - Adult male
Central Park Lake NY, USA - March 8, 2006
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren

Bufflehead (Bucephala albeola) - Adult female
Central Park Lake NY, USA - March 8, 2006
Canon EOS 20D, Canon 400mm f/5.6 L USM
© Martin Lofgren