Phrynosoma douglassi, commonly known as the Greater Short-horned Lizard, is a species of lizard found primarily in the western United States and parts of Mexico. This lizard is characterized by its flattened body, short horns on its head, and a spiny texture, which helps it blend into its arid surroundings. It typically inhabits grasslands, shrublands, and rocky areas. The diet of Phrynosoma douglassi mainly consists of ants and other small insects. This lizard is known for its unique defense mechanism; when threatened, it can puff up its body and, in some cases, even squirt blood from its eyes to deter predators.