Dicrostonyx

Lemmings are known for their cyclic population dynamics. They can experience explosive population growth followed by a rapid decline. During peak population years, they migrate in large numbers across their habitat, often swimming across rivers and lakes. Lemmings are herbivorous and primarily feed on grasses, sedges, and other plant materials.

Lemmings reproduce prolifically, especially during peak population years. They have relatively short gestation periods, and females can give birth to multiple litters of pups in a single breeding season. Lemming populations tend to follow a boom-and-bust cycle, with population crashes occurring after peak years.

Lemmings are small rodents with round bodies, short legs, and short tails. They have dense fur that provides insulation in their cold, Arctic environments. Lemmings can vary in color, with some species being brown, gray, or tan. They have sharp claws that allow them to dig burrows in the tundra.

Lemmings have been the subject of myths and misconceptions, including the false belief that they engage in mass suicidal leaps off cliffs during migrations. In reality, their migrations are driven by the need to find new food sources when local vegetation becomes depleted.

The conservation status of Lemmings is not generally a focus of conservation efforts because their population dynamics are primarily driven by natural cycles. However, their habitat may be affected by climate change, which can impact the availability of food and suitable living conditions. Lemmings play a crucial role in Arctic ecosystems as prey for various predators, including Arctic foxes, owls, and stoats, and their population dynamics have far-reaching effects on the Arctic food web.