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The '''lemming''' ([[binomial]] name ''Lemmus lemmus'') is a small rodent native to northern [[Scandinavia]] and [[Arctic]] regions. Measuring 2 to 6 inches in length, lemmings are famous for their migratory patterns during which, under pressure from increasing populations, they migrate in large numbers across the terrain. The idea that they deliberately throw themselves off cliffs committing mass suicide, long considered a myth, actually has a basis in fact, though the deaths are certainly not deliberate, merely the result of overcrowding and effectively running out of land. In the 1950s [[Walt Disney]] made a film called ''White Wilderness'' which featured thousands of lemmings apparently jumping off cliffs into the icy sea, but it later transpired that they had been pushed.

==Lemming Myths==

Lemming migrations have in the past reached [[plague]]-like proportions. The fear of these lemming plagues among Scandinavian villagers has led to unusual beliefs surrounding the animal. [[Olaus Magnus]], in his [[1555]] ''Historia de Gentibus Septentrionalibus'', describes the then-common belief that they bred in the clouds:

:"In the foresaid Helsingia, and provinces that are near to it, in the diocese of Upsal, small beasts with four feet, that they call Lemmar or Lemmus, as big as a rat, with a skin diverse-coloured, fall out of the ayr in tempests and sudden storms; but no man knows from whence they come--whether from the remoter islands, and are brought hither by the wind, or else they breed of feculent matter in the clouds; yet this is proved, that so soon as they fall down there is found green grass in their bellies not yet digested. These, like locusts, falling in great swarms, destroy all green things, and all dyes they bite on, by the venome of them. This swarm lives so long as they feed on new grass. Also they come together in troops like swallows that are ready to fly away; but at the set time they either dye in heaps with a contagion of the earth (by the corruption of them the avr grows pestilentiall and the people are troubled with vertigos or the jaundice); or they are devoured by beasts called commonly lekeirt or hermalins, and these Ermines grow fat thereby, and their skins grow larger."<ref name="a">Quoted in ''The Living Age'', by Robert S Littell, 1873.</ref>

The [[Danish]] physician [[Olaus Wormius]], in his treatise on the Lemming in his posthumous ''Museum Wormianum'' (1655), debunked this proto-[[Darwinian]] idea of [[spontaneous generation]] by showing through dissection that lemming anatomy contained testes.

==References==
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[[Category:Rodents]]