deer mouse

Short definition from Wiktionary

Noun

1. 1
   Any of the muroid rodents in the genus Peromyscus, especially Peromyscus maniculatus.
2. 2
   Many of the muroid rodents with notable jumping capability within the subfamily Neotominae (family Cricetidae), including all species in the genera Peromyscus and Habromys, as well as some species in several others.