When most people think of dinosaurs, they imagine tall, towering beasts. This was not always the case. Some prehistoric dinosaurs, like the microraptor, were actually quite small. These creatures were approximately 1.5- 2.6 feet long, and weighed about 1 kilogram. The microraptor was actually quite different from most flying dinosaurs, because it had four wings, instead of two. It had two wings on each of its hind legs and forelegs. Oddly enough, the microraptor couldn't fly. Scientists believe that they might have glided through the trees, much like our common day flying squirrel.