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Lemming

Lemmings are small rodents in the subfamily Arvicolinae, found in northern parts of North America, Europe, and Asia, especially Arctic and subarctic habitats.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Lemmings are small rodents in the subfamily Arvicolinae, found in northern parts of North America, Europe, and Asia, especially Arctic and subarctic habitats. They are known for population cycles and occasional large migrations, which have contributed to popular myths about mass suicide that are not true.

Classification and species

Lemmings are rodents in the subfamily Arvicolinae, alongside voles and muskrats. Sources describe about 20 species, with genera including Lemmus, Dicrostonyx, Myopus, and Synaptomys.

Habitat and range

Lemmings live in northern environments such as Arctic tundra, taiga, and other cold habitats across North America, Europe, and Asia. They are adapted to cold conditions with thick fur and burrowing behavior.

Diet and behaviour

Lemmings are mainly herbivores, feeding on grasses, mosses, roots, sedges, and related vegetation. Their populations can fluctuate dramatically, and some species migrate when food availability or population density changes.

Cultural myths

Lemmings are widely associated with the false claim that they commit mass suicide by running off cliffs or into the sea. Britannica Kids states this is untrue; lemmings generally try to avoid water, though accidental drowning can occur during movement or migration.

Key facts

  • Lemmings are small northern rodents with thick fur, short tails, and small ears.
  • They are found only in the Northern Hemisphere, mainly in Arctic and subarctic regions.
  • Their diet is mostly plant matter, including grasses, mosses, roots, and sedges.
  • Population sizes can rise and fall sharply over time.
  • The popular idea that lemmings deliberately jump off cliffs is a myth.
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Canadian context

Lemmings are part of Canada’s Arctic and northern wildlife, with species present in northern regions of Canada. They are relevant to Canadian ecology because they are an important herbivore in tundra food webs. [2][3][11]

Frequently asked questions

What is a lemming?
A lemming is a small rodent in the subfamily Arvicolinae that lives in northern regions of the Northern Hemisphere.
Where do lemmings live?
They live in Arctic and subarctic habitats across North America, Europe, and Asia, including tundra and taiga.
What do lemmings eat?
Lemmings mainly eat plants such as grasses, mosses, roots, sedges, and other vegetation.
Do lemmings really jump off cliffs?
No. Britannica Kids says the cliff-jumping suicide story is untrue, although lemmings can drown accidentally if water blocks their path.
Why are lemmings known for migrations?
Some species move in large numbers when populations grow or conditions change, often in search of food or new habitat.

References

  1. Encyclopaedia Britannicahttps://www.britannica.com/animal/lemming
    Supports: Definition of lemmings as small rodents; about 20 species; Northern Hemisphere range; large swarming migrations.
  2. Encyclopaedia Britannicahttps://www.britannica.com/animal/lemming
    Supports: Classification, habitat range, and general facts about lemmings.
  3. Britannica Kidshttps://kids.britannica.com/students/article/lemming/275427
    Supports: Family and genera; lemming classification among rodents.
  4. Britannica Kidshttps://kids.britannica.com/kids/article/lemming/390128
    Supports: Physical description, range, population cycles, diet, burrowing, and myth about cliff jumping.
  5. SoftSchoolshttps://softschools.com/facts/animals/lemming_facts/2602/
    Supports: Species counts, habitat, and population fluctuations.
  6. Animal Fun Factshttps://www.animalfunfacts.net/rodents/112-lemming.html
    Supports: Common physical characteristics, related groups, and example species names.