Nest in rock crevices on rocky beaches, sea-facing talus slopes, cliffs, boulder fields, and lava flows. Typically on unvegetated talus. Forages on open ocean (Hunt and Harrison 1990, Hunt et al. 1993). All colonies, with the exception of one on St. Mathew Island, are located on volcanic islands adjacent to deep water (USFWS 2006a).
Hunt, G. L. and N. M. Harrison. 1990. Foraging habitat and prey taken by Least Auklets at King Island, Alaska. Mar. Ecol. Prog. Ser. 65: 141-150.
Hunt, G. L., N. M. Harrison, and J. F. Piatt. 1993. Diets and the selection of foraging habitat by planktivorous auklets in the Bering Sea. Status and conservation of seabirds in the North Pacific. Proc. Pac. Seabird Group Symp., Victoria, B.C.
USFWS. 2006a. Alaska Seabird Information Series (ASIS) Draft report. Compiled by Lynn Denlinger. USFWS, Migratory Bird Management, Nongame Program, Anchorage, AK. Available online at: http://alaska.fws.gov/mbsp/mbm/seabirds/species.htm