A rare anhinga sighting in Boulder County excites birdwatchers. The tropical bird had only been documented three times in Colorado.

Park rangers on Thursday captured an Argentine black and white tegu lizard that was spotted in Joseph D. Grant County Park ...

A water bird rarely seen in Colorado appears to be taking a summer vacation at a private Boulder County pond, to the delight ...

The natural marvels, which do everything from enabling acrobatic flight to insulating against Antarctic cold, continue to ...

Unlike birds whose plumage is mostly blue, the green coloring of a green bird’s feathers is primarily a combination of ...