The White-ankled Mouse is common in rocky areas in both dry and humid regions on the Central Plateau of Mexico and in west and central Texas, southern New Mexico, and Oklahoma. It clearly prefers rocky situations, whether it lives in forests or in brush-covered foothills. Learn more about the Peromyscus pectoralis, more commonly known as a White-ankled Mouse, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.