Jackdaw in Wind Tunnel (image) Lund University Share Print E-Mail Caption The air vortexes behind the wings has been processed. Work is done Marco Klein Heerenbrink. Credit Photographer Aron Hejdström Usage Restrictions None Share Print E-Mail 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.