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Because they do not do what we think they do.
Lemmings are alleged to hurl themselves off cliffs to their deaths, in large numbers.
This is a myth which originated in a film by the Disney company.
It doesn't happen.
They are not extinct because they fit their environmental niche and have no pressures on them which they cannot meet.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoLemmings are very common rodents, cyclic in their population, being abundant some years, and just common the next.
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