The Saurischian Dinosaurs had a lizard like hip construction, with the hip element called the pubis pointing forward and downward.
The Saurischians form two major groups, the Sauropoda, which are large herbivores, and the Theropoda, which are carnivores (meat eaters).
Today's birds had common ancestors that were from the Theropod line. Oddly, the bird is derived from the "lizard hipped" dinosaurs and not from the bird-hipped Ornithiscian dinosaurs. The "bird-hipped" condition of a pubis pointing toward the back of the animal occured twice independently, once in the Ornithischians and once in the birds.
