https://udspace.udel.edu/items/25123fd7-6d51-4ed5-9947-12e5f4a5bad9
Estimating behavioral multipliers to American black duck and lesser scaup resting metabolic rate to...
Historic declines of American black duck (Anas rubripes, hereafter black duck) and lesser scaup (Aythya affinis) populations may be the result of multiple...
american black duck
https://natureworks.nhpbs.org/animals/american-black-duck/
American Black Duck | Anas rubripes - NHPBS NatureWorks
Apr 1, 2026 - The American black duck is not really black; it is more of a dusky brown.
american black duckanasnhpbsnatureworks