Pit vipers · All Facts

Pit vipers
Pit vipers (including rattlesnakes) have heat-sensing pits between their eyes and nostrils that can detect <hl>temperature differences as small as 0.003°C</hl> — allowing them to "see" warm-blooded prey in total darkness.
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Next evidence →king cobraThe king cobra is the only snake in the world that builds a nest for its eggs, gathering leaves and vegetation into a mound and guarding it aggressively for the entire 60–90 day incubation period.

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More in Snakes

spectacle (brille)Snakes have no eyelids — each eye is covered by a transparent scale called a spectacle (brille).
pelvic spursPythons and boas still carry pelvic spurs — claw-like remnants of ancestral hind limbs used in courtship, not walking.
vomeronasal (Jacobson's) organA snake's forked tongue delivers odor molecules to the vomeronasal (Jacobson's) organ in the roof of its mouth.
100–400 vertebraeA snake's spine can hold 100–400 vertebrae — plus up to about 200 more in the tail — far more than a human's 33.

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