The Washington Gap Analysis Project created breeding bird maps only. The non-breeding birds (e.g., wintering, pelagic (coastal), and birds expanding their ranges) are represented only by NatureMapping sightings.
The Washington Gap Analysis Project could not find any historical research records (i.e., Breeding Bird Atlas, Breeding Bird Survey, Bird Banding and Recovery) for 73 species of birds. The Blackpll Warbler is one of the species.
NatureMapping observations reported by townships throughout the year.
This bird migrates late in fall east of the central US states. It is a regular vagrant in the west, including Washington State. Breeding takes place all across northern Canada, into the Northwest Territory and most of Alaska.Text edited by Gussie Litwer