'Parrot dinosaur' walked on all fours, then graduated to two ( video) - CSMonitor.com. As the evidence mounts that the antecedents of my parrots were dinosaurs, I am more and more certain that my parrots are special. The discovery of the "parrot dinosaurs", dinos who progressed from walking on four feet to two, makes clear the connection between modern birds and the first dinosaurs. Psittacosaurus lived 100 million years ago in China, and was an herbivore. Polly want a banana? So, everybody who also has three living dinosaurs in their office, raise your hands. Didn't think so.