Some of the scientific groundwork that paved the way for a rebirth of the long-extinct dire wolf took place in Pennsylvania.

Imagine standing on the edge of a wild, green expanse in Florida, where a panther prowls silently, a swallowtail butterfly ...

Debris removal following Tropical Storm Helene needs to be done more carefully to not destroy high-priority habitat and endangered species.

The Trump administration has proposed changing the interpretation of the Endangered Species Act to allow developers to alter ...

From Mexico to the mountains, Arizona’s hummingbirds are on the move. Here's when and how to spot them in Arizona.