They must be recharged regularly. Since Border Collies are under the direct control of a handler, they disperse wildlife only in prescribed areas and at the direction of the handler. They can be called off at the approach of an aircraft, avoiding potentially dangerous dispersals. Border Collies are also effective against most forms of birds and larger wildlife, not simply waterfowl. Method - Wailers, Noise Generators Airside workers and the general public may consider the noises that these products make an annoyance.
Habituation is also a primary concern.
Solution Border Collies are silent workers, rarely barking when chasing down wildlife or birds. Though some birds may frighten initially when they hear the approach of a barking dog, the silent rush attacks of a Border Collie prove far more effective in long-term deterrence. Method - Distress Cries, Alarm Calls With few exceptions, birds and wildlife will only respond to distress cries of their own species. Playback equipment must be of good quality for best results. Sound and playback units are expensive and require a power source to operate.