The Cactus Mouse (Peromyscus erimicus) inhabits arid regions of the southwestern United States and northern Mexico. It has large ears, a long tail, and a pale, sandy-colored coat that blends with its desert surroundings. Nocturnal by nature, it primarily feeds on seeds and insects, playing a crucial role in seed dispersal.

Peromyscus erimicus, commonly known as the cactus mouse, is native to the southwestern United States and northern Mexico. It is primarily found in regions such as Texas, New Mexico, Arizona, and parts of Mexico, including Chihuahua and Sonora.

The cactus mouse typically inhabits arid and semi-arid regions characterized by desert and scrubland environments. These areas often feature sandy or rocky soils with sparse vegetation, including cacti and other xerophytic plants.

Peromyscus erimicus is adapted to survive in harsh desert conditions. It is nocturnal and omnivorous, feeding on seeds, insects, and plant material. Its ability to conserve water and withstand high temperatures allows it to thrive in its ecological niche, often occupying burrows or crevices to escape the daytime heat.