Note: Information is dated. Do not rely on it.Mouse. The name given to certain species of small mammals, belonging to the order Rodentia, or gnawing animals. The mice, along with the rats, form the very extensive genus Mus, and, with other allies, the family Muridae. The British species of mice are the common house mouse, which is too familiar to need any description; the harvest mouse, the smallest and at the same time one of the prettiest of British mammals, which in the summer constructs a curious nest high up in the straws of the standing corn, retiring in the winter into burrows, in which it hibernates; and the long-tailed field mouse, which frequents fields and gardens.