More than 600 people participated in the filming of "Le peuple migrateur", which lasted more than 3 years and cost more than 40 million US dollars. The sceneries cover more than 50 countries and regions around the world, and the recording film is more than 460 kilometers long. This film used 17 pilots and two scientific expeditions
. In the early stage of filming, the film crew went through untold hardships, spending nearly a year following the migratory birds to and fro, trying to get close to them, understand their habits, and eliminate the migratory birds' guard against humans. After the migratory birds became familiar with the days with the camera crew, they were no longer afraid of the camera, and the film was successfully shot.
The film crew should observe the bird's flying habits and use different shooting techniques for each bird. Cameramen must be vigilant in a completely real world, and let the birds follow the camera closely. Cameramen say they can't drive the small plane as casually as the birds, and the plane will encounter a lot of trouble. To maintain the continuity of shooting, it is necessary to ensure that the shot images can move the audience. In addition, the shooting angle and scene often change, sometimes sideways, sometimes upside down, and sometimes upside down. The sceneries are far away to an orderly flight team, and close to the feathers of a bird. From this perspective, the audience can gradually identify with the intimate relationship with the birds and feel the power of their wings
.
