Glass Snake, a legless lizard of southern United States. The name refers to the brittle tail, glassy appearance, and snakelike body and motions. Fully grown, glass snakes range from 18 inches (45 cm) to more than three feet (90 cm) long; two-thirds of this length may be tail. The body is covered with green-spotted black, olive, or brown scales. The underside is greenish-white.

When seized, a glass snake may shed most of its tail, which continues to wriggle while the lizard escapes. The animal later grows a new tail, which is shorter than the old one and lacks vertebrae.

Species in the United States are: Ophisaurus ventralis; O. attenuatus; and O. compressus. Glass snakes belong to the family Anguidae.