Rodents are unwanted in gardens because of the damage they can cause to fruit, vegetables, seeds, bulbs, plants, and containers. They can also expose people and pets to various diseases and parasites. However, rodents love gardens as gardens provide them with both shelter and readily available food sources.
The only rat species you are likely to find in your garden is the brown rat (Rattus norvegicus). There are several mouse and vole species in North America, and a small number of these can take advantage of food and lodging in gardens. However, their numbers are rarely high enough to cause much damage.
The house mouse (Mus musculus), field vole or short-tailed vole (Microtus agrestis), and deer mouse (Peromyscus maniculatus) are most likely to be seen in gardens. In America, wild populations of the house mouse and field vole can skyrocket in rural areas after mild winters when they have little die-off. These rural species are normally found in specific habitats:
- House mouse: wooded areas, fields, croplands, yards
- Deer mouse: old fence posts, tree hallows hollows, log piles
- Field vole: rough grassland