Since 1964, Bird-X has been the leader in producing humane pest & bird repellent products. We offer the most comprehensive line of bird control products that are eco-friendly (‘green’), environmentally-safe, non-toxic and non-harmful. Our bird deterrents range from state-of-the-art laser technology to ultrasonic / sonic bird control, goose and pigeon repellents, bird spikes, bird netting, animal sound repellers, and visual scare repellers. Programmable species-specific bird repeller. The Bird X Peller Pro uses birds own distress calls to create a “danger zone” – it frightens infesting bird pests away for good. Predator cries help scare all the birds. Actual Distress Cries. Choose any or all of 8 sounds including predators to give the birds even more of a sense of danger. Then customize by choosing volume silent time between sounds and hours of operation.