The animals (both vertebrates and invertebrates) on Wisconsin's Natural Heritage Working List are species known or suspected to be rare in the state. It includes Species of Greatest Conservation Need that are legally designated as "endangered" or "threatened," as well as species in the advisory "special concern" category.

It includes species legally designated as "endangered" or "threatened," as well as species in the advisory "special concern" category. Species become rare for a number of reasons, including habitat loss, habitat degradation, highly specialized habitat needs, disturbance sensitivity, genetic problems, exploitation, predation, competition and ...

Eastern Massasauga (Sistrurus catenatus) is a State Endangered Species and a Federally Threatened Species.This rattlesnake is strongly associated with floodplain habitats along medium to large rivers, especially near river confluences, where they primarily occupy open canopy wetlands, such as sedge meadows, fresh wet meadows, shrub-carrs, and adjacent upland …

Blanchard's Cricket Frog (Acris blanchardi), listed as Endangered in Wisconsin, prefers ponds, lakes, and a variety of habitats along and adjacent to streams and rivers including marshes, fens, sedge meadows, low prairies, and exposed mud flats. This species may breed in no or low-flow areas of streams and rivers but primarily breeds in ...

Notice: To apply for an Endangered and Threatened Species permit, you are required to provide all applicable information requested on this form pursuant to s. 29.604, Wis. Stats., and chapter NR 27, Wis. Admin. Code. Rare species data collected from permit holders and applicants may be added to the Wisconsin Natural Heritage Inventory database.

This species often forages in open wet meadows or in shrub-carrs dominated by speckled alder. They overwinter in streams and rivers in deep holes or undercut banks where there is enough water flow to prevent freezing. This semi-terrestrial species typically remains within 300m of …

Western Ribbonsnake (Thamnophis proximus), a State Endangered Species, is found along rivers as well as within and adjacent to wetlands. Nothing has been reported regarding overwintering for this species in Wisconsin, but they are known to communally den with other snakes.

American Marten (Martes americana), a State Endangered mammal, lives in mature, dense conifer forests, mixed conifer-hardwood, and hardwood dominated forests, including hemlock, white pine, yellow birch, maple, fir, and spruce. Marten young are born in tree dens in late-March and April and are weaned when about 6 weeks old.

Attn: Endangered Resources Review Program PO Box 7921, Madison WI 53707-7921 dnr.wi.gov. Notice: Pursuant to s. 23.27(3)(b), Wis. Stats., this form must be completed and submitted to the Department of Natural Resources (DNR) to request an Endangered Resources (ER) Review of proposed development, management, planning or similar type of project.

Northern Flying Squirrel (Glaucomys sabrinus) is a Special Concern species in Wisconsin and a Protected Wild Animal under NR 10.02 Wis. Admin. Stats. Stats. It inhabits a number of forested natural communities and the presence of conifers and a relatively moist environment are important habitat components.