. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. WETLANDS forested and open habitats, including wetlands. Some species of small mammals (insectivores and rodents) have broad environmental tolerances, and individuals can be found in a range of habitats from wetlands to uplands. The Virginia opossum occupies a variety of habitats but is often found near water. Most shrews require moist microclimatic conditions; four Illinois species are known to occ
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. WETLANDS forested and open habitats, including wetlands. Some species of small mammals (insectivores and rodents) have broad environmental tolerances, and individuals can be found in a range of habitats from wetlands to uplands. The Virginia opossum occupies a variety of habitats but is often found near water. Most shrews require moist microclimatic conditions; four Illinois species are known to occur in wetlands but are not restricted to them (Hoffmeister 1989, Mumford and Whitaker 1982). The eastern mole occurs in both forests and open habitats, including areas that are periodically inundated (Mumford and Whitaker 1982). Bats are not typically considered wetland animals, but all 12 species that occur in Illinois are listed in Appendix 4 as mammals that use wetlands. Bats forage in and above floodplain forests and above ponds, marshes, and bogs as well as in and above upland forests, above streams and fields, and near buildings (Barbour and Davis 1969, Hoffmeister 1989). In addition, most bat species in Illinois roost in trees, at least occasionally, during the summer and could use floodplain forests for that purpose. The importance of floodplain forests as bat habitat is indicated by recent captures of all species that occur in Illinois along the Cache River (Illinois Natural History Survey and Illinois Department of Conserva- tion, unpublished data). The swamp rabbit inhabits only bottomland forest and swamps in southern Illinois (Hoffmeister 1989, Kjolhaug et al. 1987). Sixteen species of rodents can be found in wetlands, although few are limited to such habitats (Hoffmeister 1989, Mumford and Whitaker 1982). The rodents most closely associated with wetlands are the beaver, muskrat, and marsh rice rat. Ten of Illinois' carnivore species use wetland habitats; ponds and
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