Species MammalsMasked Shrew

Masked Shrew

Sorex cinereus

CommonMammal
Illustration of Masked Shrew (Sorex cinereus)

The Masked Shrew is among the most abundant and widespread small mammals in North America, found in virtually every moist habitat type from coast to coast. It has a metabolic rate so high that it must eat nearly its own body weight daily and will die of starvation in a matter of hours without food. Shrews locate prey in leaf litter and soil using a form of crude echolocation.

Habitat
Moist forests, marshes, meadows, and tundra
Diet
Insects, earthworms, small snails, and spiders
How common
Common

Best time to see a Masked Shrew

The best time to see a Masked Shrew is April–September, when about 67% of U.S. sightings happen, based on 990 research-grade iNaturalist observations.

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