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.
NatureMapping observations reported by townships throughout the year.
This shearwater (formerly called Slender-billed Shearwater) winters during our summer in the North Pacific. It is seen along the west coast from British Columbia to California during southward migration in fall and winter. Some non-breeding birds remain off California during our winter. It breeds off Australia.Text edited by Gussie Litwer