This left a gap in the fossil record, but Petrified Forest National Park didn’t get its name for nothing: The volcanic ash that burst from California’s Mojave Desert ended up in northeast Arizona’s ...

Passenger pigeons once darkened the sky, now they're just a footnote. These are the birds I never had the chance to see.

Angel, a 26-year-old bald eagle from Wisconsin that was too gravely injured to be returned to the wild, serves as "ambassador ...

If someone said the best place to see all the hummingbirds was in the desert of southern Arizona, you might not believe them.