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A sampling program directed to four taxa of small mammals considered at risk in the Lower Mainland of British Columbia [Washington southern red-backed vole (Clethrionomys gapperi occidentalis), Pacific water shrew (Sorex bendirii), Trowbridge's shrew (Sorex trowbridgii) and shrew-mole (Neurotrichus gibbsii)] was carried out to determine their distribution, abundance and habitat use. Fifty-five sites in a variety of forest types were surveyed by pitfall trapping during late July-October 1992: riparian coniferous (11); non-riparian coniferous (9); riparian mixed (26); and non-riparian mixed (9) forests. A total of 999 individuals of 15 species of small mammals was captured. No C.g. occientalis was found in any of the 18 sites that we surveyed over its historical range. S. bendirii was extremely rare (only 3 individuals were caught), restricted to riparian forested habitats, and distributed in a narrow range. Habitat loss and fragmentation are likely the major causes of local extinction. S. trowbridgii occupied
Zuleta, G.A., Galindo-Leal, C.. 1994. Distribution and Abundance of Four Species of Small Mammals at Risk in a Fragmented Landscape. Ministry of Environment, Lands and Parks. Wildlife Working Report. WR64
English Name: Southern Red-backed Vole, Pacific Water Shrew, Trowbridge's Shrew, Shrew-mole
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