This is the U.S. Fish and Wildlife Service s home page for the Endangered Species Program, and it contains a wealth of information for anyone interested in efforts to protect threatened and endangered plants and animals. Wyomingites may not be particularly interested in, say, saving the Upper Mississippi River's Higgins' eye pearlymussel. But there are articles links, and background information on a host of species in the West. Extensive information is available on recovering species, like the delisted American peregrine falcon, and currently listed ones like the grizzly bear protected as a threatened species in the lower 48 states.
Myriad links allow further research into topics of interest.