Table 1. Species detected at different distances from the I-15 in 2004 and 2005 in southern Utah, USA; number of individual captures of each species.

Distance to Road 2004 2005

CLOSE

Peromyscus maniculatus (124)
Perognathus parvus (39)
Tamias minimus (27)
Dipodomys microps (5)
Rethrodontomys megalotis (4)
Peromyscus boylii (3)
Neotoma lepida (2)
Lemmiscus curtatus (1) *
Spermophilus variegatus (1) *

Perognathus parvus (12)
Peromyscus maniculatus (10)
Dipodomys microps (8)
Tamias minimus (2)
Sylvilagus audubonii (2) *
Lepus californicus (1) *
Neotoma lepida (1) *
MID Dipodomys microps (11)
Perognathus parvus (4)
Peromyscus maniculatus (1)
Tamias minimus(1)

DISTANT

Peromyscus maniculatus (120)
Perognathus parvus (54)
Tamias minimus (18)
Peromyscus boylii (11)
Ammospermophilus leucurus (4) *
Rethrodontomys megalotis (3)
Peromyscus truei (2) *
Neotoma lepida (1)
Dipodomys microps(1)

Dipodomys microps (2)
Perognathus parvus (2)
Peromyscus maniculatus (1)
* = species caught only at these distances