American Black Duck (Anas rubripes) lives in freshwater wetlands across Eastern North America. It feeds on aquatic plants insects. Its conservation status is Least Concern.
Fascinating facts about the American Black Duck
- Heavier than any other duck in its genus, the American black duck tips the scales at 720-1,640 g (1.6-3.6 lb) and stretches 54-59 cm (21-23 in) long with an 88-95 cm (35-37 in) wingspan. A study of 376 males showed an average mass of 1.4 kg (3.1 lb) and 176 females averaged 1.1 kg (2.4 lb), making it the heaviest Anas species. This bulk hunters prize.
- A female can lay six to 14 oval eggs, each averaging 59.4 mm long, 43.2 mm wide and weighing 56.6 g (0.125 lb). Incubation runs 25-26 days, shared by both parents, and the chicks fledge about six weeks after hatching. predators like crows and raccoons are common.
- The black duck interbreeds regularly and extensively with the mallard, a pattern once limited by habitat preference. Deforestation in eastern forests and tree planting on the plains have eroded that separation, leading to the high hybridization rates observed today. Captive studies show hybrid females often die before sexual maturity, following Haldane's rule.
- Although listed as Least Concern, the black duck's numbers have plummeted from about 2 million in the 1950s to roughly 50 000 today, driven by wetland drainage, urban expansion, warming climates and rising seas. To counter this, the U.S. Fish and Wildlife Service and groups like the Atlantic Coast Joint Venture are buying and restoring habitat, providing safe stop-over sites for over 10,000 birds each fall.
- During breeding, its diet is about 80 % plant matter and 20 % animal matter, but in winter the animal component jumps to 85 %. Ducklings rely almost entirely on water invertebrates for the first 12 days, then shift to seeds and other plant foods.
Sources
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At a glance
RangeEastern North America
HabitatFreshwater wetlands
DietAquatic plants insects
About the American Black Duck
In the misty dawn of North America's wetlands, the American Black Duck glides effortlessly, its dark silhouette slicing through the water with a soft, whispery whoosh, as if the very fabric of the marsh has come to life. With each stroke of its powerful wings, it weaves a path of subtle ripples, a testament to its serene and unhurried nature, a true embodiment of the wild and tranquil beauty that defines its native habitats. As it forages for aquatic plants and insects, its gentle quacks echo through the stillness, a soothing serenade that resonates deep within the heart of this enchanting ecosystem.
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