The Gila monster (Heloderma suspectum) is a heavy slow-moving venomous lizard. It is the largest extant lizard native to North America north of the Mexican border. The name "Gila" refers to the Gila River Basin in the U.S. states of New Mexico and...
The Mexican beaded lizard (Heloderma horridum) is one of the two species of venomous beaded lizards. It and the other member of the same genus, the Gila monster, are the only lizards known to have evolved an overt venom delivery system. As it is a...
The Guatemalan beaded lizard (Heloderma charlesbogerti) is a highly endangered species of venomous lizard. It is the rarest species of beaded lizard, and it is believed that fewer than 500 individuals exist in the wild, making it one of the most...
