The Amur brown lemming occurs in Transbaikalia, southern Yakutia, and the Amur region of eastern Russia. Its summer coat has a dark dorsal stripe, and it feeds mainly on mosses.
In its summer coat, the back is dark brown with a clear black stripe down the middle. The belly is ochre-yellow mixed with grey, and the cheeks are bright ochre to reddish.
Green mosses make up the main part of its diet. It also eats sedges and cotton grass, and small amounts of insects in summer.
IUCN Red List · Least Concern (LC) · Global