Bird scares: the principle of action, description and reviews
For some gardeners and landowners, birds have become real pests. Floating in packs, they steal some of the grain stocks and crops. But urban residents can also suffer from neighborhood with some birds. For example, chirping twitter under a window in the early morning or "bombarding" parking lots can become unbearable for a person.
Ways to combat penguin
The most humane and suitable way to combat this problem is to scare away the birds. Today, the market offers a variety of devices that are designed specifically for this purpose. It can be noted that there is no universal device, and what the gulls react to, crows may not be afraid. Therefore, the birds' deterrents differ from each other in the principle of operation and area of impact. The main types of devices and their features are described below.
Today, ultrasonic repeller of birds is considered the most popular. Usually it is chosen, because in the price category it is the most affordable, it is easy to install and operate. During its work, it does not create discomfort for a person and at the same time it affects birds and, possibly, rodents. The bottom line is that animals and birds feel a greater sound range than the human ear (up to 20 KHz), and therefore those signals that we do not hear and do not perceive at all are frighteningly affecting the birds. The oscillation of ultrasonic frequencies causes them fear of possible danger, and the instinct of self-preservation does not allow them to settle in this place. If you turn on the device and wait three weeks, all the birds that wanted to settle here will leave these places forever. If the device is equipped with automatic frequency switching, this will also affect rodents, as they can not get used to one stable signal.
Disadvantages of ultrasonic devices
But such kind of bird scarers have their shortcomings. The specificity of ultrasound allows to cover a small area. Usually its protection extends to 600 sq. M. meters. If this is a very inexpensive device, the area it protects, barely reaches 100 square. meters. Therefore, ultrasonic bird repeller is suitable for use in small garden plots, kitchen gardens, hangars, garages.
It is also important to consider the location of its installation, because ultrasound is not able to penetrate through partitions, walls and glass. When this sound reaches an obstacle, it is reflected from it, so the device "works out" only open spaces.
Modified ultrasonic devices
Some ultrasound bird offenders have an increased impact on "uninvited guests." They are equipped with light devices and motion sensors (to save energy). Together, light and ultrasound at short distances have the maximum efficiency. But such devices are better for acquiring, if people in the zone of action do not often pass people or transport. Although some devices have the ability to configure against false triggering or the ability to disable this function at certain times.
This kind of instrument imitates the sounds of birds, warning of danger or screams of birds of prey. These devices cover the territory much more than the ultrasonic analogs, since it is possible to simultaneously switch on several radiators. Also, the sound repeller of birds has a solid construction, which allows you to apply under various weather conditions.
The drawbacks are that these devices are narrowly focused, that is, they discourage only a certain species of birds. Other groups of birds may not react at all to these sounds. But if you find a good manufacturer, you can order an individual device from those "pests" that prevail in your area.
This type of devices is mainly used in large enterprises, for example, at airports. Their work requires the constant participation of a person, but of all these are the most effective scavengers of birds. The bird perceives as a threat to life a bright fast moving beam. Laser handheld devices are expensive and are considered professional.
There are fixed installations, and they are used in an autonomous mode. But in the daytime they are indiscriminate and ineffective. Such devices are suitable for those places where ultrasonic scarers are not able to cover the territory, and the use of bioacoustic devices is unacceptable.
These devices scare away all birds and animals with the sound of a noisy shot. The gun fires at the set time and operates from the propane balloon. Although there is no need for an installation, but a cylinder replacement is required from time to time. Shots are very noisy, so these scarers are used mainly in fields and other farming plantations.
Universal types of devices for scaring birds usually combine in their device several of the characteristics listed above. It is often possible to see a device that, in addition to ultrasound, includes bioacoustics. Producers argue that the dignity of these scarers is a high probability that birds will not be populated near your site unless they succumb to the fear of sound vibrations, perhaps they are affected by the cry of foreign birds. But such devices, as a rule, have large dimensions, considerable energy consumption and low efficiency. In addition, the cost of upgraded devices is much higher than that of narrowly-directed repellers.
Having considered the main categories of devices for scaring birds, one can assume which type of device is most relevant in your situation. So, among the ultrasonic devices there is a bird repeller "WK-0020". Waves that send this device do not catch pets, and while they hear such birds as starlings, crows, pigeons, sparrows. The device can be installed on the balcony, attic, near the garage, in a small utility room. To work, he needs two batteries (finger).
Bird scare: reviews of people
As soon as the device for scaring away birds appeared on the market, they immediately began to be interested not only in the owners of summer cottages, but also in urban residents. But, unfortunately, many were disappointed, since they do not work for most birds. For example, the sound bird repeller LS-2001 mimics the screams of a hawk, an owl and a falcon, but city sparrows and other daredevils, as it turns out, do not fear them and can sit quietly, cooing around a "sound-depleted" device. Therefore, in order for the device to be effective, it is necessary to know exactly which birds are afraid of certain predators. For example, outside the city, starlings know what a predator is, and really fall, clinging to the ground.
Some owners also recommend that you carefully approach the choice of ultrasonic devices, because they have learned from their experience that brave pigeons not only do not fear these sounds, but, conversely, fly to them and try to sit down to them as close as possible.
If you decide to buy a bird repeller, try to be more careful in choosing it and more accurately find out which birds it is on. Also, do not believe the promises of advertising, since most devices are not able to drive away all kinds of birds.