Microtus Pennsylvaticus, commonly known as the meadow vole, is a small mammal native to North America. There are several synonyms for this species that are commonly used in scientific literature. One synonym is Microtus hortulanus, which is sometimes used to refer to voles found in more suburban or urban habitats. Another synonym is Microtus ochrogaster, which is used for voles found in the western United States. In addition, Microtus pennsylvanicus has been called the "field mouse" or simply "vole" in common usage. Regardless of the name used, these small rodents play an important ecological role as prey for many predators and as seed dispersers for various plant species.