Black-bellied Whistling-Duck Similar Species Comparison

Similar Species

Fulvous Whistling-Duck

Adult

The belly is chestnut on Fulvous Whistling-Ducks, but is black on Black-bellied Whistling-Duck. Fulvous Whistling-Ducks also have a dark not red bill and the head is chestnut not gray like Black-bellied.

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Main Species

Black-bellied Whistling-Duck

Adult (fulgens)

Long-necked duck with a red bill and long pink legs. Its body is mostly chestnut, with a black belly and a gray face. The white patch in the wings appears as a stripe down its wing while at rest.

Adult (fulgens)

In flight shows a large white patch on the upperwings. Flies with large pink feet projecting beyond the tail tip and head and neck head slightly down, imparting a kinked appearance.

Adult

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Adult and juvenile (fulgens)

Juveniles are browner than adults and lack the black belly. Note also the black bill and flesh colored legs shown by juveniles.

Adult (autumnalis)

South American adults (subspecies autumnalis) show a wide, pale gray-brown band separating the rich brown neck from the black belly.

Adult

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Juvenile (autumnalis)

The long, slender neck, plank-like wings, and long legs projecting beyond the tail make this recognizable as a whistling-duck. Juveniles show a pale brown belly, gray bill, and pale pink legs and feet.

Adult (autumnalis)

The stout bill and slim neck help create the whistling-duck "look." The pink-orange bill, white eyering, and large black belly patch that extends up the flanks combine to rule out other similar species.