Polar bears spend the winter in their dens ... first to combine collar data with camera footage of polar bears. "Every den we ...

For the second summer, hundreds of rattlesnakes in a Colorado "mega den" are being livestreamed as part of Project RattleCam.

As many as 2,000 rattlesnakes spend the winter in the den that is livestreamed from Colorado. Here's how to watch.

If you were wondering how long bears hibernate for, that actually depends on the climate of the region they call home. For bears in more colder, northern climates, their hibernation period might last ...

“Alright, WHO WOKE UP THE BEAR?” the agency joked via Instagram. “The answer is Mother Nature. Spring has arrived, and bears ...

The rattlesnakes took refuge in the den for winter, but on Thursday, a video captured a couple of rattlesnakes emerging from their den. Now, people can watch the reptiles for a second season.

Colorado’s “mega den” of rattlesnakes is becoming active after a long winter season. The mega den, also known as Prairie ...

A "mega den" of Colorado rattlesnakes are ready for their day in the sun. Some snakes have started to emerge from their winter hibernation to bask in the spring sun on the rocky Colorado hillside ...