Field mice rarely venture into inhabited buildings but in winter months, they will enter sheds and other backyard structures where fruit and vegetables are stored.
Their colour varies with sandy/orange-brown fur on the head and back and yellowish fur on the flanks and white on the belly.
They eat a high proportion of the seed crop of trees such as oak, beech, ash, lime, hawthorn and sycamore. Small snails and insects are particularly important sources of food in late spring and early summer when seeds are less available. They also eat apples and will attack newly planted legume seeds.