A Gila monster is a large, venomous lizard that lives in the deserts of the southwestern United States and northern Mexico. Growing up to two feet long, these reptiles have thick bodies covered in distinctive beaded scales that form bold patterns of black, orange, pink, or yellow.

Despite their fierce name and appearance, Gila monsters move slowly and spend most of their time underground in burrows, avoiding the desert heat. They only emerge to hunt for bird eggs, small mammals, and other prey. When threatened, a Gila monster can bite and hold on tenaciously, delivering venom through grooves in its teeth. However, they're generally shy and will avoid humans if given the chance.

These ancient reptiles have survived largely unchanged for millions of years. Interestingly, scientists studying Gila monster venom discovered compounds that helped develop an important diabetes medication, showing how even dangerous creatures can contribute to human medicine.

In the United States, Gila monsters are protected by law, and it's illegal to capture, harm, or keep them as pets. They're one of only two venomous lizards in North America, the other being the closely related Gila monster.