Tucson Bird Alliance and volunteers have counted the stunning birds each spring in their only U.S. breeding stronghold.

The Arizona bark scorpion (Centruroides sculpturatus) is the most venomous scorpion in North America. Don’t let its small ...

A very mild winter and unusually warm temperatures have caused scorpion populations to explode in Arizona. Learn how to ...

This jumping spider took down prey twice its size, and its hunting methods might be unorthodox, but they work.

Bees, bats and hummingbirds are doing more than buzzing around — they’re keeping Arizona’s ecosystems and food supply alive.