This is an African stiff-tailed duck. Adult males have a chestnut body, a blue bill and a black head.
Spotted at Woodland Park Zoo. This duck breeds in two main areas: eastern Africa from Sudan and Ethiopia to Tanzania and west to eastern Zaire, and southern Africa from Zimbabwe to Cape Province, South Africa. Its breeding habitat is shallow fresh waters, and it is also found in brackish and saline lakes in winter.
Rarer than previously believed, it was uplisted from a species of least concern to Vulnerable species status in the 2017 IUCN Red List.