The Kamchatka shrew (Sorex camtschatica) is a species of mammal in the family Soricidae. It is endemic to Russia.
The species was first described in 1972. Before that it was considered a subspecies of cinereus shrew (Sorex cinereus).[1]
Kamchatka shrew inhabits riparian scrubs in North-Eastern Siberia, in the upper reaches of the river Omolon (its tributary Kegan), and in Kamchatka (Kambalny Bay, Lake Azhabachye, neighborhood of Milkovo).[2]
The body length reaches 66mm, with an average of 57mm. The tail is about 79% of the body length and can be 54mm long. The average weight of an adult is 5g.[3] The back is ashy-gray, sides are lighter, with brown tones. The belly is light gray. This species is characterized by the highly elongated rear feet with well-defined bristle brush hair.[1]
Biology of the species is poorly understood. The breeding season lasts from April to September. Females annually produce up to three litters with 5.1 cubs per liter on average.