Most of these repellers are solar-powered while others are equipped with long-lasting batteries that need to be recharged once in a while. It’s best to choose one that doesn’t require frequent maintenance to ensure that your property is guarded against pest birds all day long. It is important to know what you are buying and why you are doing so. Ensure you have all the information about how a bird deterrent works before purchasing.

Bird-X Balcony Gard is one of the best bird repeller available for safely chasing away invading birds. It has a smaller coverage of 900 square feet, making it great for balconies, driveways, patios, etc. The next good point is the detailed sound levels. Normally, the other devices are categorized into low-middle-high or 1-2-3 level, thus I have to reread the manual to choose which level is workable for what kinds of animals. But this model paints another picture, as it takes me no time to adjust as the names of specific animals are already clearly painted around the button. It can also be categorized based on the level of sound frequency. They can be low-frequency (under 10,000 Hz), moderate (10,000 – 20,000 Hz) and high frequency (above 20,000 Hz). The high-pitched sound produced by ultrasonic devices is far from the human hearing range, but it falls within the hearing capacity of birds. The lowest setting could eliminate rats, foxes, and weasels. The middle level would be effective for stray cats, badgers, and skunks. For these two settings, I can hear the continuous pitching noise when standing within 1 metre around.Ultrasonic bird control device gives off the high-pitched sound to drive trouble-makers birds away. Lastly, the strongest setting, in combination with alarm and intense flashing LED light, would be a scary threat to wild animals, namely bats, birds, rodents. This highest level emits high-pitched sound over 24,500 Hz, which is far higher than humans’ auditory range. However, the alarming sound is still annoying to me. In this case, the task of scaring has been simplified to a maximum. Low price and low maintenance! Even the kids will enjoy tossing them around the yard inadvertently scaring off birds. Most animals, including birds, perceive visual information by association. That is why only typical features, such as an image of eye can be used to scare them off. This is the case of a Scare Eye Balloon Bird Repellent. This sturdy “beach ball” keeps the birds away with the help of its bright colors as well. Its swaying in the wind will cause discomfort and desire to fly away. Most outdoor ultrasonic repellers are motion-activated. Once a movement registers on its sensor, it will emit sound and engage the blinking light. It’s best to place this on the spot with the least foot traffic so the sensor won’t react on passers-by and other typical movements on your property. ✔️Covered pests

Several ultrasonic bird deterrents produces loud sound as well. Some can emit sound from 75 dB up to 120 dB within a metre radian. This roaring sound immediately frightens the birds and other animals, but it is a hearing-related danger to humans as well.It uses a ‘Triple Scan Technology,’ which allows it to detect birds 115 feet out for 12,000 square ft of detection. It would work effectively in an open space. Place spikes and netting as a barrier along the garden and crops. However, this measure will mostly work on large birds while the small ones have an easy time overcoming such barriers. While the ultrasonic device is ideal for a variety of birds, it is also effective in repelling bats, rodents, and other small critters. The frequency on the device may need to be adjusted to effectively repel these pests. Residential Ultrasonic Pest Solutions