any nocturnal Old World mouse of the genus Apodemus inhabiting woods and fields and gardens
A field mouse is a mouse with a long tail that lives in fields and woods. Any of various small mice or voles, especially of the genus Microtus, inhabiting meadows and fields and often causing damage to crops. Also called meadow mouse. or wood mouse In general, any mouse that normally lives in fields; more strictly, any of about seven species of small, long-tailed mice in the genus Apodemus (family Muridae). Field mice in this genus are found in fields, woodlands, and mountain meadows in the warm and temperate parts of Eurasia. They are grayish or light or reddish brown and are 2-5 in. (6-12 cm) long excluding the tail. They generally live in burrows and build nests of grass and other plants. They eat seeds, roots, and other plant material, occasionally damaging crops or young trees
any of various small mouselike rodents of the family Cricetidae (especially of genus Microtus) having a stout short-tailed body and inconspicuous ears and inhabiting fields or meadows