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Fig. 11. Relationships between flight path curvature, horizontal and turning
velocity in freely flying fruit flies. (A) The variance in flight path
curvature decreases with increasing horizontal velocity. At maximum forward
velocity of approximately 1.0 m s–1, flight path curvature is
apparently constrained to a unique value of approximately 0.016
mm–1. (B) Relationship between flight path curvature and
turning velocity. (C) Data distribution between horizontal and angular
velocity. Each data point represents an 8 ms position measurement of each of
the tested flies. The vertical line in C indicates maximum horizontal velocity
of 0.49 m s–1 averaged over all flies. Normalized relative
frequencies are plotted in pseudo-colour.