drake; red head; red iris; black bill with white ring (Zoo; 2008-09-18)

Common Pochard
Aythya ferina

Native Range: Eurasia

Notes: this diving duck the Eurasian counterpart of the Redhead duck of North America; pronounced sexual dimorphism.

light grey back (Zoo; 2008-09-18)

showing off his leg ring; black breast (Zoo; 2008-09-18)

posing for a portrait (Zoo; 2008-09-18)

hen; brown overall, except for whitish face, throat (Zoo; 2008-09-18)

drake in the wild (Luxembourg; 2007-10-16)

hen in the wild (Luxembourg; 2007-10-16)