It’s war against Arizona's invasive species, though it’s not clear that humans are winning.

Global warming probably isn't triggering the fungal disease killing off Arizona frogs, some Arizona researchers say, despite a new study that concludes warming is causing the extinction of many frog ...

The Phoenix Zoo recently released 1,000 tadpoles into the Tonto National Forest, part of a program to save the threatened Chiricahua leopard frog. The zoo collects eggs every year, and those eggs ...