Runways: Lemmings make paths through the grass, under roots or under snow, called runways. They use these runways for shelter and for finding food.

Diet: Lemmings are herbivores (plant-eaters) who eat moss and grass.

Habitat and Range: Lemmings live in the cold tundra, woods, marshes, and meadows of northern North America and northern Eurasia.

Anatomy: Lemmings range from 3 to 6 inches (8-15 cm) long plus a very short tail. They weigh from 1/2 to 4 ounces (14-113 gm).