The discovery in Patagonia shows that frogs have had a tadpole stage for at least 160 million years. Here’s how the ancient frogs compare to those of today. Tadpoles and adults of the extinct frog ...

Rick Koval and I didn’t catch an adult bullfrog for our herp series this summer, but what we did find was more than suitable to cross the species off the list. It was a bullfrog tadpole, and it was ...

In the dark of night, a kayak glides along the shoreline. Headlamps cut through the darkness and reflect their beams off two ...