Movie 2

Animation of particles tracked at 700 frames per second, displayed at 30fps for Barn Owl, Tawny Owl and Goshawk. Bird animations derived from stereogrammetry of previous experiments, matched to landmarks measured in the current study. Particle colours indicate vertical velocity, ranging from red upward to blue downward.

High aerodynamic lift from the tail reduces drag in gliding raptors

James R. Usherwood, Jorn A. Cheney, Jialei Song, Shane P. Windsor, Jonathan P. J. Stevenson, Uwe Dierksheide, Alex Nila, and Richard J. Bomphrey

Journal of Experimental Biology 2020. 223:None-None; doi: 10.1242/jeb.214809