Abstract: The method according to the invention is permanent preservation against pesky birds and pest animals from a site where they cause damages. The method comprises: a dislodging phase where at least two frightening devices are installed on the site. The number of devices installed depends on the kind of site and the surface area of the site. For a short period of time during the dislodging phase, an intensive action of the frightening devices is sustained to dislodge the birds. The dislodging phase is followed by a dissuasion phase to dissuade the birds from returning back to the site. The dissuasion phase includes an active action of the frightening devices for three days. The active action is less severe than the intensive action of the dislodging phase. Finally, there is a controlling phase including a continuous action of the frightening devices to permanently prevent any bird or animal from settling on the site.