Also known as a "whistlepig" and a "thickwood badger," groundhogs are now synonymous with shadows and spring weather. But ...

Across the United States, a semi-aquatic rodent that can weigh as much as 20 pounds is chewing through wetlands, farms, and flood defenses, turning a long-simmering ecological problem into a ...

Chattering squirrels, charming coypus, and tail-slapping beavers — along with some other rodents — have orange-brown front teeth. Researchers have published high-resolution images of rodent incisors ...