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), also called commonly the Motagua Valley beaded lizard, is a highly endangered species of beaded lizard, a venomous lizard in the family Helodermatidae. The species is endemic to the dry...
