TUCSON, Ariz.— The Center for Biological Diversity petitioned the U.S. Fish and Wildlife Service today to protect the Willcox Playa tiger beetle under the Endangered Species Act. The rare tiger beetle ...

The rare Sonoyta pupfish were introduced into a desert river habitat inside the huge Biosphere 2 structure near Tucson. The dish are native to Quitobaquito Springs near the Arizona-Mexico border, but ...

Climate change and habitat loss are affecting animal populations around the world and reptiles such as South Australia's own endangered pygmy bluetongue are susceptible to higher temperatures and ...

There is a rare desert flower that is only found in a three-square mile area of Nevada. Also targeted for that area are plans for a new lithium mine. The U.S. – and the world – needs lithium to meet a ...