2013 Envirothon

smallest members of the rodent family
mice, voles, lemmings
Why are populations large?
they breed often and have large litters
Food supply for?
many predators, including bear, coyotes and others
When are they active?
at night; all year
What is Pennsylvania home to?
two native species of mice
four voles
bog lemming
two jumping mice
two species from Europe
Winter sign of rodents?
Mouse cache of seeds and nuts; food that has been collected for winter
What type hibernate?
only jumping mice
What do they eat?
mainly herbivores, but sometimes eat insects, eggs, spiders, small creatures
Where to find them?
almost anywhere; meadows, farms, cities, marshland, homes; surface of ground or tunnels
Nests?
round nests made of mounds of leaves and grasses
inside the nest chamber is soft plant material; litters born here
Young?
born hairless, blind, called pups
at one month can fend for themselves and mother can give birth again -> large populations

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