The small fish are expected to thrive inside Biosphere 2 and establish a new, local population, according to researchers.

Rapid development in the Valley is displacing burrowing owls from their native agricultural habitats, leading to a decline in ...

Prioritizing which animals and plants to help is driven mostly by whether we like them or not. Some experts say that may not ...

PHOENIX — The U.S. Fish and Wildlife Service proposed stripping the Gila chub of its Endangered Species Act protections on Monday. However, the Center for Biological Diversity opposes the removal, ...

TUCSON, Ariz.— A federal judge has ordered the Trump administration to make a long-overdue decision on whether to expand critical habitat for Arizona’s highly endangered Mount Graham red squirrels.

A Mt. Graham red squirrel matriarch. (Photo by Robin Silver) TUCSON, Ariz. (CN) — Federal officials have less than two years to decide whether to expand critical habitat for what some call the most ...

One brave condor was greeted by sunny skies and a cheering crowd Sept. 27 after spreading its wings and taking its first flight over Vermilion Cliffs National Monument. Meanwhile, four ...

Arizona State University’s Senko Lab is studying ways to make fishing gear less harmful to sea turtles, sharks, and other ...

The Peregrine Fund and the Bureau of Land Management are again teaming up to release five condors into the wild at Vermilion Cliffs National Monument just south of the Utah-Arizona border on Saturday.

Two conservation groups sued the Trump administration for illegally waiving environmental laws for construction of new border wall segments. The new stretch of border wall is in the San Rafael Valley, ...

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 ...