Caucasian birch mouse
The Caucasian birch mouse is a species of rodent in the family Sminthidae, that is endemic to Russia. Reports that it occurs in Turkey probably refer to Armenian birch mouse, from which it can only be reliably distinguished on the basis of karyotype. The Caucasian birch mouse inhabits the Western Montane Caucasus area, land situated between the Black Sea and the Caspian Sea.