The Norway lemming, also known as the Norwegian lemming (Lemmus lemmus) is a common species of lemming found in northern Fennoscandia, where it is the only vertebrate species endemic to the region. The Norway lemming dwells in tundra and fells, and prefers to live near water. Adults feed primarily on sedges, grasses and moss. They are active at both day and night, alternating naps with periods of activity.
It has a wide distribution from western Norway east to the Kola Peninsula. A 2021 study suggests that the lemmings of Novaya Zemlya may also belong to this species; this would extend its range east to Novaya Zemlya island, but these results have not been fully accepted.
