The Russian myotis has brown fur above and pale fur below. In Altai, bats were seen flying low over meadows and water, and cave roosts have been reported.
The dorsal fur is brown and the ventral fur whitish. Its ears are described as rounder than those of the related Myotis laniger.
In Altai, bats were observed flying about 2–6 m above meadows or birch groves and over water. Cave roosting has also been reported.
An extinction-risk assessment has not been added yet.