This shows off the beautiful patterns on the skin of a Gila Monster, whose habitat is the South Western United States. They are one of only 3 known poisonous lizards in the world. I've touched one of these many years ago.
libutron: “ Heloderma suspectum The Gila Monster, Heloderma suspectum (Helodermatidae), is a species of lizard native to southwestern United States and northwestern Mexico. Heloderma suspectum is one of only two venomous lizard species in the world.