Lemming/ˈlemɪŋ/ Definition 1 of 2Pro Tip 1/3Arctic Animal A lemming is specifically found in cold regions, important for setting a scene. Nature documentaries about the Arctic often feature lemmings. Pro Tip 2/3Not a Hamster Even though lemmings look similar to hamsters, they're different species. Unlike hamsters, lemmings can survive harsh Arctic winters. Pro Tip 3/3Ecosystem Role Lemmings play a key part in Arctic food chains, often as prey. Lemmings are a vital food source for Arctic predators.