Snakes use night sights to stalk their prey

Snakes may use night-vision

source: New Scientist March 27 1999 p29

Researchers from Wright-Patterson Air Force Base, Ohio, have found a protein in pythons' sensory organs found in their jaw linings. The researchers think that pythons may be able to sense infrared radiation using this protein. The same organs are present in boas, while similar structures are found below the eyes of pit vipers. The protein may allow these snakes to locate warm-blooded prey, even if it is totally dark.