Mexican beaded lizard Mexican beaded lizard The Mexican beaded lizard ("Heloderma horridum") is a species of lizard in the family Helodermatidae, one of the two species of venomous beaded lizards found principally in Mexico and southern Guatemala. It and its congener (member of the same genus) the Gila monster ("Heloderma suspectum") are the only lizards known to have evolved an overt venom delivery system. The Mexican beaded lizard is larger than the Gila monster, with duller coloration, black with yellowish bands. As it is a specialized predator that feeds primarily upon eggs, the primary use of its venom is still a source of
Northern caiman lizard Northern caiman lizard The northern caiman lizard, "Dracaena guianensis", is a species of lizard found in northern South America. The caiman lizard is built similarly to its cousin the tegu, with a large heavy set body and short but powerful limbs. Its head is bulky and often a red or orange color. Their jaws are heavily muscular to help aid in eating its normal prey of snails, crawfish and fresh water clams. It also has a few adaptations that help it in its watery habitat. It has a long and flattened tail, similar to its namesake, the caiman. The long