Raptor Beak Evolution (IMAGE) University of Bristol Caption The skulls of a collared falconet (Microhierax caerulescens) and an Andean condor (Vultur gryphus), the smallest and largest birds the team studied. Credit Dr. Jen Bright. Specimens located at the Smithsonian Institution National Museum of Natural History, Washington DC, USA Usage Restrictions To be used on to illustrate the accompanying press release. 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.