When abundant, inhabits old village sites and three major habitat types on the island: bog/wet tundra, alpine/fell-field tundra, and mesic tundra. When scarce, found in fell-field habitats and boulder scree, especially within auklet nesting colonies. In winter, often invades human dwellings (Fay and Sease 1985).
Fay, F.H., and J.L. Sease. 1985. Preliminary status survey of selected small mammals. Final report to USFWS. Univ. of Alaska, Institute of Marine Science, Fairbanks, AK. 53 p.