The White-footed Deermouse (Peromyscus leucopus) is a very common and widespread rodent across the eastern half of the United States and parts of Mexico. The genus Peromyscus has many different species and all are very difficult to identify. By range and habitat, the top 4 shots here are thought to be White-footed Deermouse, but it is possible that these shots are White-ankled Deermouse (P. pectoralis) or perhaps some other similar deermouse. The individuals in the top 4 shots on the left were photographed near Rio Grande City, Starr Co., Texas, in November. 2007.