Lemmings

Lemming populations are famous for their dramatic fluctuations, often peaking every 3 to 5 years. These "lemming years" are crucial for the Arctic environment:

Lemmings are characterized by their compact bodies, short legs, and stumpy tails. They typically measure between 10 to 22 cm (4 to 7 inches) and possess long, soft fur that can range from sandy yellow to slate gray. Some species, such as the , undergo a seasonal molt, turning white in winter to provide camouflage against the snow. These rodents are well-adapted to extreme cold: Lemmings

: As herbivores, they feed on mosses, grasses, shoots, and roots. The Infamous "Suicide" Myth Some species, such as the , undergo a

In reality, lemmings exhibit when their populations become too dense. During these migrations, they may attempt to swim across large bodies of water; while they are capable swimmers, many drown due to exhaustion or panic, which observers historically misinterpreted as intentional suicide. Population Cycles and Ecosystem Impact During these migrations, they may attempt to swim

: In winter, they live in extensive tunnel systems beneath the snow, which provides insulation and protection from predators.