Arizona is home to many kinds of rattlesnakes. Take a look at the different species that live here and the different places they've been found.

As the trail wound its way into Arizona's Sky Islands, the region's biodiversity was on full display, as were the threats ...

The Florida Python Challenge is an annual competition to remove invasive Burmese pythons from South Florida. The event aims ...

Each side of Saguaro National Park offers a visitor center with restrooms and watering stations. Visitors will find maps, ...

The North American squirrel is an oft-seen but under-recognized staple of North America. They operate on a low-key level but ...

Stacker compiled a list of the most common birds seen near feeders in Arizona using data from the Cornell Lab of ...

A camera in Colorado reveals how rattlesnake mothers protect their young, showing snakes in a new light and changing old ...

The Center for Biological Diversity petitioned the U.S. Fish and Wildlife Service today to protect the Mule Mountains population of the Yarrow’s spiny lizard under the Endangered Species Act.

For the second game in a row, the Arizona Wildcats are one-score underdogs. Arizona opens as a 7.5-point underdog for its Big 12 opener against the 12th-ranked Iowa State Cyclones in Ames on Saturday, ...