Occupies a wide variety of habitats, including forests, disturbed sites, shrub thickets, meadows, marshes, bogs, and especially riparian situations with dense ground cover near open water (Long 1974, MacDonald 1980). Appears to prefer grassy openings of boreal forest with a mixture of wet and dry soil (Baker 1983, Feldhamer et al. 1993, Nagorsen 1996, NatureServe 2006).
Baker, R. H. 1983. Michigan mammals. Michigan State University Press. 642 pp.
Feldhamer, G. A., R.S. Klann, A.S. Gerard and A.C. Driskell. 1993. Habitat partitioning, body size, and timing of parturition in pygmy shrews and associated soricids. J. Mamm. 74:403-411.
Long, C.A. 1974. Microsorex hoyi and Microsorex thompsoni. Amer. Soc. Mamm. Mammalian Species No. 33 pp. 3-4.
MacDonald, S. O. 1980. Habitats of small mammals and birds: Evaluating the effects of agricultural development in the Delta Junction area, Alaska. Unpublished report for the State of Alaska, Department of Natural Resources, Division of Lands and Water Management, Fairbanks.
Nagorsen, D.W. 1996. Opossums, shrews and moles of British Columbia. Royal British Columbia Museum Handbook. UCB Press, Vancouver BC. 149 pp.
NatureServe. 2006. NatureServe Explorer: An online encyclopedia of life. Version 5.0. NatureServe, Arlington, VA. Available http://www.natureserve.org/explorer.