Mammal Species of the World's Boreal Forests


Sorex cinerus
Masked Shrew


Distinguishing Features - Body length: 7 - 12.5 cm; tail: 2.5 - 5 cm. Tiny, slender body; snout, long and slender; back, brownish; undersides, silvery-gray; tail, brown above and paler below; tip, black.

Masked Shrew Habitat

Commonest North American shrew; it is widespread throughout the boreal forest regions, including Northwestern Ontario along forest margins, bogs and marshes; also moist to dry woodlans, thickets and brushland. In Asia, it only occurs in Poberejhe Anadirsk estuary, near Anadyr, NE. Siberia.


Primarily insects but also some smaller mammals; seeds, larvae, snails, spiders and salamanders.


In the northern part of their range, Masked shrews will breed only once a year; in the southern range, they may breed several times a season.

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