The average life span of a masked shrew is less than 14 months. Blossum, P.M. 1932. A pair of long-tailed shrews (Sorex cinereus cinereus) in captivity. Journal of Mammalogy, 13:136-143. Buckner, C.H.

the masked shrew (Sorex cinereus), the dusky or montane shrew (Sorex monticolus) and the vagrant or wandering shrew (Sorex vagrans) that seems to be dominant in the islands. Salish Sea shrew ...