Two Phantom 3 Pro at La Perdrière in St-Donat, June 13th 2015.
By an exceptional hasard, at less than 30 seconds interval, I arrived at the previous site of Camp de vacances La Perdrière, in St-Donat, almost at the same time as 3 young men from Laval who also had a Phantom 3 Pro. You will notice in the video that it's not only the Phantom 3 Pro who were flying: the black flies were also flying efficiently and with a passion. Amateur video made by Pierre Forget.
