A pair of Mallards, an easily recognized species of dabbling duck that is found throughout the temperate and subtropical Americas, Europe, Asia, and North Africa, as well as Australia and New Zealand. The male birds have a bright green head (during breeding season) and are grey on wings and belly, while the females are brown all over. Both sexes have blue speculum feathers. Mallards live in wetlands, eat water plants and small animals, and are gregarious. This species is the ancestor of almost all of the breeds of domestic ducks.Photo: Richard Bartz