1. "BirdXPeller PRO Bird Repeller"
So far, there are 3 BirdXPeller models in the marker, these are: 1. BXP-PRO 1 (used for pigeons, gulls, sparrows and starlings), 2. BXP-PRO 2 (used for ravens, blackbirds, crows, cormorants and grackles), 3. BXP-PRO WP (used for sapsucker birds and the woodpeckers). These devices are quite expensive but they are really worth every penny. Regular price is around 240 euros. The additional batteries can cost up to $20 per set and the sun-operated charger is about $160. If you don't mind about the cost for as long as you get real protection from pigeons, then this device is right for you. Well, if you have more funds you can also try the Super BirdXPeller. These devices can cover up to 6 acres of land. This device costs 595 euros, excluding accessories.
2. "Mega Blaster PRO Sonic Bird Repeller"
The Mega Blaster has eight pre-recorded audios of different bird predators and just like the BirdXPeller; you can also set the silent time mode of the device so that it will sound more realistic. The control operation of the tower is kept in a NEMA-type box which is also the same with the windmills and other tower-mounted devices. Additional features are: has 3 "harassment" sounds, 3 realistic "cries" form terrifying predators and has very power ultrasonic effects for high-impact noise.
3. "Ultrason-X Repel Birds"
This device is highly programmable. It has three customizations: high, medium, and low. These settings indicate the frequency by which the ultrasonic sound is emitted by the device. Because of its special function, this device is quite expensive too. Relative to the area it can protect, it is way more expensive that the first two devices. It is currently $590 in the market, all accessories are still excluded.
4. "BalconyGard" Ultrasonic Bird Repeller
The user of the BalconGard should expect that the pigeons will not leave the balcony or the patio immediately after it is installed. The birds will still come back a couple of times more until they realize that the place is not conducive for habituation anymore. The user should also realize that this device does not work like throwing a pebble to the birds (which scares the birds right away). Assuming that you are a pigeon, you would experience irritating sensation that slowly builds up while you stay in the area protected by BalconGard. Eventually, you will not be able to stand the irritations anymore and you will have no other choice but to leave the place for good. The manufacturers of BalconGard assure users of a 70-feet area protection guarantee but some users have reported that the device was able to cover as much as 900 square feet. This device best works when accompanied by visual scarers like holographic predator eyes hanging from the ceiling or by owl images.