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Mouse, term applied loosely to many small rodents. The house mouse (Mus musculus), found worldwide, is gray-brown with large ears, a pointed nose, and a naked tail. It is about 6 in (15 cm) long and weighs under 1 oz (28 grams). The house mouse eats almost everything, nesting in paper. The field mouse is an important herbivore, and in turn important as prey for many birds and mammals.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Mississippian to Mud hen