Flowchart from Scientific Research

Overhead view of flight hall. Each of the N = 4 Harris hawks flew from one of three alternative starting positions (bird icons), chasing a food lure (yellow arrow) that was pulled forward by a pair of linear motors (gray rectangles) from its starting position on a towline with a trailing drag line (green solid line) that ran around 3 or 4 out of 6 pulleys (red circles). Dummy towlines (green dashed lines) were laid around the remaining pulleys, so that the bird would not be able to anticipate which of the 6 alternative paths the lure would follow. The hawk and lure were tracked by 20 motion capture cameras positioned around the room (camera icons). Ropes (black circles) were hung as obstacles in the configuration shown for the test flights with obstacles.

DOI