A lemming is a small rodent, typically found in or near the Arctic in tundra biomes. They are known for their cyclic population booms and busts, and are often inaccurately associated with the myth of mass suicide during migrations. Lemmings have a stocky appearance with short legs and tails, and are adapted to cold environments, with thick, soft fur. They primarily feed on plant material and play a significant role in their ecosystem by serving as prey for various predators.