The New York Times has a writeup on the predatory abilities of a dragonfly. Only 16 neurons are required for the dragonfly to track and calculate trajectories to reach its prey.
Interestingly, a dragonfly has four wings which confers extraordinary flight abilities. But, even when handicapped by losing a single wing, it is still able eat its fly food mid-flight.
One researcher at Janelia Farms in particular attaches electronic sensor backpacks to more finely measure flight trajectories and most likely in the near future, neuronal activity during flight. Here’s a three year old talk from that lab.