How Big Did Feathered Theropods Get? (IMAGE) North Carolina State University Caption This scale illustration shows size of feathered theropod herbivores compared to humans. Credit Lindsay Zanno, NC State and NC Museum of Natural Sciences Usage Restrictions Please credit. 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.