Mus musculus; Print; The house mouse (Mus musculus) is a small mammal of the order Rodentia; characteristically having a pointed snout; large rounded ears; and a long and hairy tail. It is one of the most abundant species of the genus Mus. Although a wild animal; the house mouse has benefited significantly from associating with human habitation to the point that truly wild populations are significantly less common than the semi-tame populations near human activity.; 1700-1880