Home | About Us | How to Participate | Biodiversity Modules | Projects | Maps | News | Resources
Species Code: PTAL
Breeding Range Map
Metadata (Data about data or how the map was made)
This species is locally abundant at major nesting sites on the outer coast, on rocky islands.
Good habitat in the core areas of use included coastal shrub habitat and cliffs in the Sitka Spruce zone, limited to the islands (Mid Bodelteh I., East Bodelteh I., Carroll I., Jagged I., Dhuoyautzachtahl, and Alexander I.).
Washington breeders represent the nominate northern form P. a. aleutica. Data are scarce from the BBA period for colonial nesting seabirds due to the logistical problems of censusing offshore islands, so we relied primarily on previous data for this species. CassinŐs Auklets are the most abundant non-larid (e.g., not a gull) breeding seabird in Washington, constituting 34% of all breeding seabirds, though they occur on only six islands. Their numbers fluctuate annually, based on food supply and climatic events. El Nino/Southern Oscillation events tend to decrease seabird breeding productivity. Birds are occasionally noted in the inland waters of Puget Sound during the breeding season, but surely represent non-breeding birds.
Translated from the Washington Gap Analysis Bird Volume by Uchenna Bright
Text edited by Gussie Litwer
Webpage designed by Dave Lester