Gila monster Gila monster The Gila monster ("Heloderma suspectum", ) is a species of venomous lizard native to the southwestern United States and northwestern Mexican state of Sonora. A heavy, typically slow-moving lizard, up to long, the Gila monster is the only venomous lizard native to the United States and one of only two known species of venomous lizards in North America, the other being its close relative, the Mexican beaded lizard ("H. horridum"). Although the Gila monster is venomous, its sluggish nature means it represents little threat to humans. However, it has acquired a fearsome reputation, and is sometimes killed despite
Side-blotched lizard are now usually considered subspecies of "U. stansburiana". "U. encantadae", "U. lowei", and "U. tumidarostra" might be subspecies of a distinct species (Las Encantadas side-blotched lizard), instead. Similarly, "U. auriculata" and "U. clarionensis" might be subspecies of a single species, the Revillagigedo side-blotched lizard. Side-blotched lizard Side-blotched lizards are lizards of the genus Uta. They are some of the most abundant and commonly observed lizards in the deserts of western North America. Their cycle among three colorized breeding patterns has achieved notoriety and is best described in the common side-blotched lizard. They commonly grow to six inches including the tail,