: For winter digging, they grow specialized flattened claws on their front feet and have stiff bristles on their soles to aid in burrowing through snow. Habitat and Ecology
: Brown lemmings do not hibernate . They spend winters in "subnivean" environments—insulated tunnel systems beneath deep snow that protect them from extreme cold and avian predators. brown lemmi~g
: Brown lemmings have rounded bodies with reddish-brown backs and rumps, and grey heads and shoulders. : For winter digging, they grow specialized flattened
: They can become sexually mature as early as 3 weeks of age. : Brown lemmings have rounded bodies with reddish-brown
The most notable aspect of brown lemming biology is their dramatic population peaks and crashes, typically occurring every .
: They are strictly herbivorous, consuming up to several times their body weight in fresh plant material each day. Their diet shifts from fresh grasses and sedges in summer to frozen green plant material and moss shoots in winter. The Population "Cycle"