Pterosaurs (IMAGE) University of Sheffield Caption Physical and theoretical models show that pterosaurs (Thalassodromeus, right) could not meet the energy requirements of skimming, a rare feeding strategy practiced habitually by just a few extant Rynchops species(black skimmer, left). Credit Mark Witton, University of Portsmouth 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.