94 
Rose, Everton, Stankavich, and Walke 
Table 2. Number and percent (of individuals within a species) of small 
mammals taken in 12 nonforested and 7 forested study grids in the Dismal 
Swamp. 
Nonforest habitat Forest habitat 
(51,399) a (13,254) a 
Species 
Total 
Percent of 
individuals 
Total 
Percent of 
individuals 
Sorex longirostris 
40 
91 
4 
9 
Blarina brevicauda 
59 
92 
6 
8 
Cryptotis parva 
5 
100 
0 
0 
Oryzomys palustris 
1 
100 
0 
0 
Reithrodontomys humulis 
76 
100 
0 
0 
Peromyscus leucopus 
21 
35 
39 
65 
Ochrotomys nuttalli 
25 
74 
9 
26 
Sigmodon hispidus 
2 
100 
0 
0 
Microtus permsylvanicus 
26 
100 
0 
0 
Microtus pinetorum 
4 
100 
0 
0 
Synaptomys cooperi 
40 
100 
0 
0 
Mus musculus 
2 
100 
0 
0 
Total individuals 
301 
83.6 
58 
16.4 
New individuals 
per 1,000 trap-nights 
5.857 
4.376 
Total species 
12 
4 
a Numbers in parentheses are the total number of trap-nights in that habitat. 
The studies of Handley (8 days in 1953), Breidling (on four forest plots 
for 1 week in each of three seasons in 1979 and 1980), and Rose (two 
study sites over 2 months in 1980) were brief or restricted to a few sites. 
By contrast, the current studies lasted 15-18 months each, and together 
evaluated the mammals on 19 study grids. Our studies recorded one new 
species for the swamp, S. h. virginianus . Two individuals were recaptured 
