This guide contains birds that can be found in the Denver-Boulder Metro Area, including Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, and Jefferson Counties.
The ruddy duck (Oxyura jamaicensis) is a duck from North America and the Andes Mountains of South America, one of the stiff-tailed ducks. The genus name is derived from Ancient Greek oxus, "sharp", and oura, "tail", and jamaicensis is Jamaica.