Types of Bird Deterrent Systems
The oldest design of bird deterrent is a scarecrow which is usually in the shape of a human. The scarecrow theory has been used upon numerous times the past, and not all visual scare devices are shaped like . The "Flashman Birdscarer," Iridescent tape, and tremble balloons, and other visual deterrents are all built on the idea of visually scaring birds. This method doesn't work so well with all species, considering that some species frequently perch on scarecrows.
Many species of wind and ferrule bird are naturally instinctively afraid of predators such as birds of prey. "Hawk kites" are designed to fly from poles in the wind and hover above the field to be protected. They are shaped to match the of a bird of prey and in the case of the Peregrine Hawk Kite also mimic the flight patterns. This flight pattern scares the birds to find an area it will feel unthreatened by. It is a very humane way of deterring birds.
Helikite bird scarers use a lighter-than-air combination of a helium balloon and a kite. Helikites fly up to 200ft in the air with or without wind. Although they do not look like hawks, they fly and hover high in the sky behaving like birds of prey. Helikites successfully exploit bird pests' instinctive fear of hawks and can reliably protect large areas of farmland. Helikites work best on wild birds and must be used in open fields or areas.
Balloons overall are an inexpensive deterrent. However, this method relies on the movement of balloons, which is something that birds can become used to. The long-term effectiveness of this method can be increased by periodically moving the placement of the scare devices. Balloons can be used to scare birds from specific areas such as trees or in buildings where there is no wind or other viable option.