The Harvest Mouse, Micromys minutus, is a small rodent native to Europe and Asia. It is typically found in fields of cereal crops such as wheat and oats, in reed beds and in other tall ground vegetation such as long grass and hedgerows.
They never enter into houses; are carried into ricks and barns with the sheaves; abound in harvest; and build their nests amidst the straws of the corn above the ground, and sometimes in thistles. They breed as many as eight at a litter, in a little round nest composed of the blades or grass or wheat. One of these nests I procured this autumn, most artificially platted, and composed of the blades of wheat; perfectly round, and about the size of a cricket-ball. It was so compact and well-filled, that it would roll across the table without being discomposed, though it contained eight little mice that were naked and blind.