www.thinkprogress.org/climate/2013/12/28/3106221/endangered-species-act-turns-40/
"Since then the ESA has been credited with saving a number of species from the brink of extinction, including the bald eagle, the American alligator, the grizzly bear and the prairie dog. The act has prevented the extinction of 99 percent of the more than 2,140 species it currently protects."
