Figure 1: Images of midge swarms in the laboratory, taken with the same cameras and illumination used to obtain the data.
From: Three-dimensional time-resolved trajectories from laboratory insect swarms

(a) A snapshot from a swarming event. Midges are swarm above a square black plate that serves as a nucleation point for the swarm. (b) An inverted, long exposure of the swarm, showing the trajectories of individual midges. The contrast in both images is enhanced for better visualization.