How do snakes detect heat to locate prey?

Some snakes, like pit vipers, boas, and pythons, detect heat using specialised heat-sensing pits located between their eyes and nostrils. These pits contain sensitive membranes that can detect infrared radiation emitted by warm-blooded prey. This ability allows snakes to locate and strike accurately, even in complete darkness. The heat-sensing system works in conjunction with their vision and sense of smell, making them highly efficient hunters.