Animal
American black duck
Anas rubripes
A large dabbling duck (21–23 inches) of the eastern North American salt marsh and freshwater wetlands. Closely related to the mallard but adapted to colder, saltier, more-marginal wetland habitats. Delaware Bay and the Delmarva Peninsula are core wintering and breeding habitat. Once the most abundant duck in eastern North America, the species declined steeply in the 20th century due to wetland loss and hybridization with expanding mallard populations; conservation work since the 1980s has stabilized but not recovered historical numbers.
Scientific
The American black duck (Anas rubripes) is a large dabbler closely related to the mallard. Adults are dark brown with a paler face; in flight, the white underwings flash distinctively against the dark body. Sexes are similar (unlike mallards), making field ID more dependent on bill color and call than on plumage.
Habitat: the species is more salt-tolerant and cold-tolerant than the mallard, occupying tidal salt marsh, brackish marsh, freshwater wetlands, and beaver ponds. Breeding range extends from the eastern Maritimes south to Virginia/[[asheville|North Carolina]]; wintering range covers the eastern seaboard and inland eastern wetlands.
Diet: aquatic vegetation, seeds, mollusks, crustaceans, aquatic insects.
Conservation history
The American black duck was the most abundant duck in eastern North America through the early 20th century. Population declined steeply mid-century due to:
- Wetland loss — drainage of breeding marshes and wintering coastal habitat
- Hybridization with mallards — expanding mallard populations in the East have increasingly hybridized with black ducks, eroding the species’ genetic distinctness
- Hunting pressure — historical, since reduced
Conservation work since the 1980s — including the Black Duck Joint Venture, wetland protection across the [[atlantic-flyway|Atlantic Flyway]], and harvest management — has stabilized the population at roughly half of historical numbers. [[delaware-bay|Delaware Bay]]‘s NWRs and state wildlife areas are part of this institutional protection.
See also
Auto-generated from this entry’s typed relations: frontmatter, grouped by relation type so the editorial signal isn’t flattened.
- Counterpart to: [[canada-goose]]
- Member of: [[animal]]
- Contained by: [[delaware-bay]] · [[atlantic-flyway]] · [[delmarva-peninsula]]
Sources
- [[us-fish-and-wildlife-service|U.S. Fish and Wildlife Service]] American black duck species accounts
- Black Duck Joint Venture conservation documentation
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