In fact, some taxonomic authorities still consider it conspecific, including the American Ornithological Society.

These are small, compact ducks with stout, scoop-shaped bills, and long, stiff tails they often hold cocked upward.

In summer, they have rich chestnut bodies with bright blue bills.

It is separable from the ruddy duck by its all-black face and larger size.

The female builds the nest out of grass, locating it in tall vegetation to hide it from predators.