Arizona has added a new species of bat to the list of night-flying creatures that frequent the state. The recent confirmation ...

The signs read “Welcome to California” and “Agricultural Inspection, All Vehicles Prepare to Stop.” Along California’s borders with Oregon, Nevada and Arizona, border protection stations run by the ...

An endangered bat species has been detected in southeastern Arizona. Researchers say the discovery of the Mexican long-nosed ...

Arizona's state bird fends for itself against predators in the desert, making its home in prickly plants. Here's what to know ...

The mangrove swamp on Palm Beach has not been used in any manner since at least 1958 when aerial images were fist taken.

"Continued restoration within Fossil Creek is expected to occur to maintain this initial investment of time and resources." ...

Large wildfires in the desert were once rare. Now experts worry that invasive plants and a changing fire cycle are putting our saguaros and our homes in danger.

USA TODAY analysis finds 3.3 million Americans live in areas with "very high" wildfire risk and 14.8 million more at ...

(Sonya Bennett-Brandt) Aquatic invasive species (AIS) have been making trouble for Lake Tahoe’s ecosystem ever since people started sticking them in there in the mid-1800s. Invasives crowd out native ...

A weed which spreads by rhizomes, seeds, and cuttings has been on the move, following three years of wet weather and intensive growth.