Nayarit mouse
Peromyscus boylii simulus The Nayarit mouse or Sinaloan deer mouse (Peromyscus simulus) is a species of cricetid rodent endemic to Mexico.The Nayarit mouse is the smallest mouse within the P. boylii species group, with a head and body length of about 10 cm (3.9 in), and a tail measuring about the same again.They typically also have a shorter snout than other members of the species group.The tail is hairy, usually darker above than below, and ends in a distinct tuft.[1] It inhabits forested terrain[3] in coastal plains and river valleys below 200 m (660 ft), including mangrove swamps, acacia thickets and thorn scrub.