The emperor newt is a highly toxic newt native to China. It can grow up to 8 inches (20 cm) long. The emperor newt is generally nocturnal, and the top of its vertebrae and skull have especially thick bone. Additionally, the orange warts on its back are poison glands, and when the newt is grabbed, the tips of the ribs will squeeze out poison from the glands. Emperor newts have enough toxin to kill approximately 7,500 mice. Emperor newts live in the high mountain province of Yunnan, China, between 1,000 feet (300 m) to 2,500 feet (760 m) feet above sea level. They inhabit pools and slow-moving streams in subtropical forests. The emperor newt usually eats small invertebrates in its environment, such as crickets and worms.