Microraptor Reconstruction (IMAGE) American Museum of Natural History Caption This is a reconstruction of a Microraptor based on digital overlays of nine fossilized specimens. Microraptor was a pigeon-sized, four-winged dinosaur that lived about 130 million years ago. Credit (AMNH/M. Ellison) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.