In the ante-steppe the forest species proper, such as Pteromys volans and Tamias striatus, disappear, but common squirrel (Sciurus vulgaris), weasel and bear are still met with in the forests.
Mystacinus), the flying and the common squirrel (Tamias striatus), the brown, common, field and harvest mouse (Mus decumanus, M.
The genus which is common to the northern parts of both hemispheres is distinguished by the large cheek-pouches and by the absence or rudimentary condition of the claw of the first hind-toe, resembles Tamias in the slender form of the body, but displays great variation in the length of the tail, which may be a mere stump, or comparatively long.
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