Presented are descriptions of and information about various endangered species in Wisconsin. They include: the timber wolf (Canis lupus lycaon); Forester's tern (Sterna forsteri); the Canada lynx (Lynx canadensis); Higgins' eye pearly mussel (Lampsilis higginsii); the piping plover (Charadrius melodus); the osprey (Pandion haliaetus); the double-crested cormorant (Phalacrocorax auritus auritus); the peregrine falcon (Falco peregrinus); the bald eagle (Haliaeetus leucocephalus); the massasauga rattlesnake (Sistrurus catenatus); the common tern (Sterna hirundo); the barn owl (Tyto alba); and the pine marten (Martes americana). A map of Wisconsin (showing favorable habitat, general breeding range, former distribution, or migration pattern) accompanies each description. Information on constructing song bird feeders, bird houses, and the use of old, dead trees (snags) by various kinds of wildlife is also presented. A list of some birds that use snags is included. (JN)