The Harvest Mouse is the smallest rodent in England and can mainly be found in the centre and the south of England. It can be found in wheat fields, but it is more likely to be found in hay meadows and reed beds, as well as in bramble patches, grassy hedgerows, roadside verges and in tall grassy vegetation.

The Harvest Mouse has golden brown fur on top and cream-white fur below. It has a body length of around seven centimetres and its long brown tail is about six centimetres in length. It can weigh as little as eight to ten grammes which is the weight of two penny coins. Its face is relatively blunt with two large black eyes and its ears are round-shaped and quite large.

Harvest Mice are active day and night, but in summer they tend to be more active at night and in winter more active in the day. They can skilfully move from stems to flower heads and to brambles looking for food such as grass seeds, cereals, insects, spiders, berries and fruit. They use grass and reeds to build their nests which are round and about the size of a tennis ball. The nests are often built about one metre above the ground and their young are brought up in them.