Most lizards eat a mainly vegetarian diet that includes flowers, fruit and leaves, although some are carnivorous, eating other reptiles, birds and small mammals. Most lizards use their sticky tongues to reach out and grab insects, including grasshoppers, flies and crickets.
Two types of lizards use their venom to paralyze their prey prior to eating it: the Mexican beaded lizard and the Gila monster. The venom in these lizards is located in their jaws in their saliva glands and, as they chew on their prey, they inject them with it.
Some lizards opt for a diet of shelled animals, including snails. These lizards, which are called Caiman lizards, use their flattened teeth to crack the shells and eat the food inside.