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
Mexican horned lizard tropical dry forest. "Phrynosoma taurus" can also persist in traditional pastures. "Phrynosoma taurus" is viviparous like some horned lizards ("Phrynosoma hernandezi", "Phrynosoma orbiculare" and others). Mexican horned lizard The Mexican horned lizard ("Phrynosoma taurus") is a horned lizard species native to Mexico. Horned lizards are sometimes referred to as "horned toads" or "horny toads", although they are not toads. Compared to other members of the horned lizards (genus "Phrynosoma"), little is known about this species. It is known to live in the Sierra Madre del Sur, south and southeast of Mexico City, in the states of Guerrero and Puebla, Mexico.