The Endangered Species Act of 1973 is the primary law in the United States for protecting and conserving imperiled species. Designed to protect critically imperiled species from extinction as a "conse
Big Creek Crayfish, Faxonius peruncus, is a threatened crustacean species in the St. Francis River of Missouri.
The West Indian Manatee was downlisted to threatened in 2017.
Two populations of California tiger salamander (Ambystoma californiense) were downlisted from endangered to threatened in 2004.
Rusty patched Bumblebee
Snail darter controversy
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The snail darter controversy relates to the discovery in 1973 of an endangered species during the construction of the Tellico Dam on the Little Tennessee River. The dam project had been authorized in
Snail darter, Percina tanasi