Heat-Sensing Pits
Special organs on some snakes' faces that let them "see" heat.
What is it?
Heat-sensing pits are small holes on the faces of some snakes, like pythons and pit vipers. They can detect infrared radiation (heat) from warm-blooded animals. The Timor python has these pits. They help the snake find prey and sense predators, and also help regulate body temperature. The Southern Cantil, being a pit viper, also has heat-sensing pits on its face.
Why it matters
Heat-sensing pits help snakes hunt in the dark. They are a special adaptation that makes these snakes very good at finding food.
Where you've seen it
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