A butterfly that went extinct decades ago after the destruction of its Bay Area habitat is now the driving force behind its ...

With it's widely varied landscapes, Arizona is home to so many cool creatures. These are 10 of the most unique animals. Have you seen them all?

Mirasaura grauvogeli had a featherlike crest and a tail like a monkey. “It's been a long time since I've been so blown away ...

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

In one of the top Arctic birding destinations in the world, environmental and health challenges are threatening some of the ...

A trio of some of the most endangered birds in the world were relocated from their home in the Vermillion Cliffs of Arizona ...

North Dakota biologists counted zero male sage grouse during their spring survey, which looked at the only two active leks ...