The life spans of some reptiles are among the longest known for any vertebrates. Many species of reptiles have lived for more than 20 years in zoos, and individuals of some species of turtles have been known to live for more than 150 years. A few lizards and turtles are herbivorous as adults. Some predatory reptiles stalk their prey, whereas others wait in ambush. Some have special behavioral mechanisms to obtain food.
African chameleons have a long, sticky tongue that they thrust out rapidly to catch insects.
Reptiles have various adaptations to protect themselves from predators. Most species avoid confrontation by hiding underground or underwater. Camouflage, flight, and threat displays are also used effectively by different species. Among the most dramatic warning signals are the rattling of rattlesnakes, the spreading neck displays of cobras and hognose snakes, and the hissing and open mouth exhibited by female alligators defending their young. Most reptiles bite when threatened, and the consequences can be painful or, in some instances, even fatal.