Statistics of individual midge accelerations.
(a) Standard deviations of acceleration components as a function of swarm size. Horizontal and vertical accelerations are nearly identical in magnitude for all the observed swarms. (b,c) Standardised acceleration PDFs, for (b) the vertical and (c) horizontal directions. (d) Standard deviations of acceleration parallel and perpendicular to the instantaneous direction of flight. The two components are again nearly identical. (e,f) Standardised PDFs of acceleration parallel (e) and perpendicular (f) to the direction of flight.