vole(redirected from vole bacillus)
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free-living, small rodent often described as a country rat because of its resemblance to a rat and its disinclination to associate with humans. They are hoarders, live in burrows and eat plant material. Like lemmings, also members of the subfamily Microtinae, they experience massive surges in population, followed by mass migrations and very heavy mortalities. There are several genera including Arvicola, Clethrionomys and Microtus.