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.
These mergansers are found wintering in brackish or salt water along the west coast, from British Columbia down to Baja California. They nest on the ground from Alaska east all across the northern continent.Text edited by Gussie Litwer