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Snakes, such as this tree snake from Java, gather scents from their surroundings. 7

Chameleons can move their eyes in different directions. This means they can hunt for food in two different areas.

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Snakes’ eyes are always open. They can’t even blink. Their eyes are covered by see- through scales that keep dust out. Some lizards have very large eyes that help them see in the dark. Many snakes, including boas, have a super sense that they use for hunting—they can see heat. A boa has special patches on its lips that help the

snake see the body heat of warm animals such as birds, bats, and mice. The boa uses this sense, like a “third eye,” to hunt, even in the dead of night.

SIDEBAR

A THIRD EYE Tuataras and some lizards have a “third eye” on top of their heads. This weird skin- covered patch senses light and dark. Experts think it helps these reptiles to adjust to life in the different seasons and changing daylight hours.

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