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
Leaf-nosed lizard Leaf-nosed lizard Ceratophora tennentii, commonly known as the horned lizard, horn-nosed lizard, leaf-nosed lizard, and Tennent's leaf-nosed lizard, is a species of lizard in the family Agamidae. The species is endemic to Sri Lanka. The generic name, "Ceratophora", means horn bearer. The specific name, "tennentii", is in honour of Irish politician James Emerson Tennent, who was Colonial Secretary of Ceylon (1845–1850). "C. tennentii" has a leaf-like appendage on the end of its nose. The species can reach lengths of over including the tail. Males usually have more green in their coloration than females have, although they can change color to