The black-bellied whistling duck (Dendrocygna autumnalis) is a species of whistling duck found in the Americas. It is a medium-sized duck with a black belly and a brown back. The male and female are similar in appearance, but the male is slightly larger than the female.
Black-bellied whistling ducks are found in a variety of habitats, including wetlands, grasslands, and forests. They are omnivorous and feed on a variety of plants and animals. They are also known to eat carrion. Black-bellied whistling ducks are social animals and live in flocks. They are also known to form long-term pair bonds.