The gila monster is one of only two venomous lizard species that are found in North America. The gila monster has venom glands below its teeth on the bottom jaw which is released when the gila monster bites its prey. The gila monster then waits while its venom kills the animal, before finally eating it.
The gila monster is a carnivorous animal and therefore has a purely animal-based diet. Bird and reptile eggs make up the majority of the gila monster's diet, along with insects, frogs, small mammals and reptiles, including smaller lizards.
Despite its large size, the gila monster is a fairly slow-moving animal meaning that it is preyed upon by a number of predators in its natural environment. Coyotes and humans (who often kill the gila monster claiming self-defence), are the main predators of the gila monster along with birds of prey and small ground-dwelling animals that hunts the eggs of the gila monster.
After mating, the female gila monster lays between 2 and 15 eggs which she buries underground. The incubation period for the gila monster eggs is one of the longest of all reptiles, as they can take up to a year to hatch.