As pit vipers, they have specialized pit organs ... and behavior. Both of these snakes have long, hollow fangs to deliver powerful venom; they sense their prey with pit organs and warn of their ...

Snake Island is a small, forested island off the coast of Brazil that writhes with thousands of venomous vipers. The snakes, ...

hollow fangs that connect with venom glands and fold within the mouth when not in use. The snake hunts from a tight coil — remaining motionless for as long as a week — while it waits for prey to come ...