Remarkably, imprinting has been used to teach reintroduced birds their migratory path. Other technologies used in the making of Earthflight included remote control drones, which had the advantage of being quiet and harmless-looking, and made "stealth" filming possible. One disadvantage was that the drone had to be programmed to return and occasionally was lost. A glider that resembled a vulture and carried cameras into flocks was another technique, as were radio controlled devices.

The book combines lots of eye candy in the form of birds-eye-views of iconic landscapes, but it is also generous with the fascinating details telling how the rare images were made. In many cases the images were results of years of experimentation and work. The patience of the crews paid off, not a single bird was lost in the making of Earthflight. 

Earthflight team member flying microlight with imprinted birds. Photograph by R. Cook.