The Washington GAP Analysis Program applied to breeding birds only. These maps, which include wintering birds, pelagic (coastal) birds, and birds expanding their ranges, do not include range maps.
NatureMapping observations reported by townships throughout the year.
This species was introduced by waterfowl hunters in Snohomish County, where a small breeding population exists mainly at the Everett sewage treatment plant, with wanderers being recorded from Seattle and Nisqually National Wildlife Refuge.
There was no habitat modeled for this duck. As is true of the main population in the eastern United States, this species is apparently hybridizing with Mallards in Washington. The very small breeding Black Duck population is probably limited by the high number of Mallards in the developed areas of western Washington with which Black Ducks probably compete.
Translated from the Washington Gap Analysis Bird Volume by Uchenna Bright
Text edited by Gussie Litwer
Webpage designed by Dave Lester