The Fulvous Whistling Duck, is a distinctive waterfowl species known for its widespread habitat and notable characteristics. This species inhabits a broad range across the world's tropical regions, including Mexico, South America, the West Indies, the southern United States, sub-Saharan Africa, and the Indian subcontinent. It is particularly adapted to wetlands with abundant vegetation, such as shallow lakes and paddy fields, making it a common sight in these environments. Adult Fulvous Whistling Ducks are relatively large, measuring about 18–21 inches in length. Males typically weigh between 26.4–37.0 ounces, while females are slightly lighter, averaging 25.1–35.3 ounces. Their wingspan ranges from approximately 85 to 93 inches, which supports their strong flight capabilities. One of the most notable behaviors of this species is its feeding habits. They are known to feed on seeds and other plant parts in wetlands, both during the day and at night. In some regions, especially where rice cultivation is common, they are considered pests. Despite threats such as hunting, pesticide poisoning, and natural predation, the Fulvous Whistling Duck is classified as a species of 'least concern' by the International Union for Conservation of Nature​​​​.
This species is known for its whistling call, which is unique among ducks and is emitted both in flight and on the ground. The ducks typically build their nests using plant material and place them either among dense vegetation or in tree holes. They are monogamous, with breeding pairs often staying together for life. The typical clutch size is around ten whitish eggs, which are incubated by both parents. The ducklings are precocial, leaving the nest soon after hatching but remaining under parental care for about nine weeks until they fledge​​.