Male Mallard (Anas platyrhynchos)
Location: Otago Peninsula, South Island, New Zealand
The Mallard duck (Anas platyrhynchos) is one of the most common species of waterfowl in the world. It is reputed to be one of the best known and most easily recognized species -- especially the male, pictured here. It may be 'common' in one sense of the word, nevertheless I think that the Mallard also is one of the best looking waterfowl species anywhere, don't you?
Update: Here is a photo of a female Mallard, too.