It is a small theropod dinosaur known for its unique jaw and slender hind limbs. The mandible does not have an external mandibular window, and the neural spines of the posterior dorsal vertebrae are fan-shaped and have hook shaped protrusions for attaching ligaments. The first metacarpal bone is short and thick, the cervical spine is retroverted, and the femur lacks the fourth trochanter. Phylogenetic analysis shows that Megalosaurus belongs to the Coelurosauria class, which is a type of theropod dinosaur. In addition, stomach fossils of Megalosaurus suggest that it may have fed on small lizards. The estimated running speed is about 17.8 meters per second. Although the relationship between Megalosaurus and birds is relatively distant, its research provides important insights into the theory that birds originated from theropod dinosaurs