How snakes hunt

Snakes also have forked tongues, which they flick in different directions to smell their surroundings. That lets them know when danger—or food—is nearby.

Snakes have several other ways to detect a snack. Openings called pit holes in front of their eyes sense the heat given off by warm-blooded prey. And bones in their lower jaws pick up vibrations from rodents and other scurrying animals. When they do capture prey, snakes can eat animals up to three times bigger than their head is wide because their lower jaws unhinge from their upper jaws. Once in a snake’s mouth, the prey is held in place by teeth that face inward, trapping it there.