Fig. 3 | Communications Biology

Fig. 3

From: Vortices enable the complex aerobatics of peregrine falcons

Fig. 3

Evolution and passage of the vortical structures over the bird. The wake plane (0.2 body length downstream of the tail of the bird) shows the contours of the streamwise vorticity magnitude (colour based on the sense of rotation, red: counter-clockwise, blue: clockwise). The path of these vortices can be tracked by following each of the corresponding streamlines. Origin of the vortices is indicated in enlarged sub-figures. a Origin of the wing vortex (WV) and tail vortex (TV), the red streamline represents the wing vortex and the blue the primary feather vortex (PFV). b Origin of the dorsal vortex (DV) and the interaction with the horseshoe vortex (HSV). c DPIV measurement in the wake plane compared with the results from the CFD simulation d in the same plane

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