Why Do Lemmings Jump off Cliffs?


Lemmings jump off the cliff when they are migrating. This happens in large groups when population density becomes too large and they search for a new habitat. On occasion, the lemmings are forced into the sea by the push of more lemmings arriving on the cliff-top.
Q&A Related to "Why Do Lemmings Jump off Cliffs"
because if there is a body of water at the bottom, they will jump in to swim across.
While many people believe that lemmings commit mass suicide when they migrate, this is not the case. Driven by strong biological urges, they will migrate in large groups when population
Lemmings are small N American rodents. Population growth occasionally causes lemmings to migrate, some die during migration due to cliffs or drowning.
The stories about lemmings jumping off cliffs are a myth.
1 Additional Answer
It's an urban myth that lemmings commit a sort of mass suicide by jumping off of a cliff. While lemmings will swim in search of new habitat, they don't, in fact, throw themselves off of cliffs. This myth was perpetuated by a Disney 'documentary' from the 1950s; the lemming scenes were faked in the movie. You can find more information here: http://www.wildlifenews.alaska.gov/index.cfm?adfg=wildlife_news.view_article&articles_id=56&issue_id=6
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