Ostrich Braking (IMAGE) Society for Experimental Biology Caption Ostriches use their feathered forelimbs as sophisticated air-rudders and braking aids, which may provide valuable information about how their dinosaur ancestors moved. Credit Nina Schaller 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.