11-17. The Gila monster (Heloderma suspectrum) of the American Southwest and Mexico is a dangerous and poisonous lizard with dark, highly textured skin marked by pinkish mottling. It is typically 35 to 45 centimeters (14 to 18 inches) in length and has a thick, stumpy tail. The Gila monster is unlikely to bite unless molested but has a poisonous bite.
11-18. The Mexican beaded lizard (Heloderma horridum) resembles its relative, the Gila monster. However, it has more uniform spots rather than bands of color. It also is poisonous and has a docile nature. You may find it from Mexico to Central America.
11-19. The komodo dragon is a giant lizard (Varanus komodoensis) that grows to more than 3 meters (10 feet) in length. It can be dangerous if you try to capture it. This Indonesian lizard can weigh more than 135 kilograms (300 pounds).