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A wildfire causes blight on the land, but it is surprising how quickly plants and animals that depend on them colonize the burned area.

The discovery of a rare three-species warbler hybrid suggests bird species in sharp decline are struggling to find suitable mates.

Multiple species of turkeys have been in America for millions of years and it is apparent that, when humans and turkeys met, we have had substantial impacts on their population sizes.

I found the mourning cloak when I was trying to photograph the beavers living at the confluence of the Green and Yampa Rivers.

A defenseless insect can gain protection from predators if it evolves to resemble a well-defended species.

A CU Boulder researcher is being recognized by the Denver Zoo for her extensive work studying the pika across the Colorado alpine

As humans evolved and expanded, so too did barn swallows, new research from CU Boulder suggests

When I arrived at the campground at Deep Lake, I was stunned and disappointed. Instead of meadows bright with flowers, I saw one healthy aster and a paltry, diffuse population of spent flowers.

These are large plants with towers, or racemes, of deep blue to purple flowers that reach heights of 6 feet. They are most spectacular when they grow intermixed with cow parsnip and loveroot.

there we were, three Americans standing near South Africa’s Drakensberg Mountains, where Barton, I learned, was studying how it was that a flower pollinated by a fly that looks like a hummingbird evolved — and may still be evolving.