Best of Web – Jacob Haimes

The below video and image were used in the paper “High aerodynamic lift from the tail reduces drag in gliding raptors,” which was published in the Journal of Experimental Biology in February of 2020. These visualizations were created by James R. Usherwood, Jorn A. Cheney, and Jialei Song. Other contributors to the paper were Shane P. Windsor, Jonathan P. J. Stevenson, Uwe Dierksheide, Alex Nila, and Richard J. Bomphrey.

Note: The captions seen here are identical to those in the aforementioned paper, I did not write them.

“Frontal view video of Goshawk and Tawny Owl passing through illuminated bubble volume. Clips begin at the first frame the volume is illuminated. These views are for context only and were not used in the particle tracking. Recorded at 120 frames per second, shown at 24 fps. Exposure duration 1/140s, or 5/700s, resulting in exactly five 1/7000s strobe flashes each frame. Wingtip trailing vortices persist in the wake, and regions of faster downwash and associated tail tip vortices convect downward following the tail indicating a step increase in lift over the body/tail section.”
“Air motions caused by gliding raptors visualized with bubbles. Photographs of a gliding barn owl (top), tawny owl (middle) and goshawk (bottom) as, or narrowly after, they passed through a 0.1 m light sheet seeded with neutrally buoyant 0.3 mm soap bubbles”

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