How to keep birds from setting off motion alarms?

My business has motion alarms set in stategic locations along the roofline to warn against burgulars. But I cannot keep the birds away, I really need the alarms, but not the birds(pigeons). How do I keep these birds away without shooting them (which I cannot do at this location).How to keep birds from setting off motion alarms?If these are Passive Infra Red (PIR) type detectors, they are set to be too sensitive, i.e., a small warm body will trigger them. This happens in houses with animals, like the family dog or cat. Inside the detector head, there is a sensitivity adjustment. Turn it to be less sensitive, i.e., it takes a bigger heat signature to trigger the detector. Sometimes, the only way to do this is trial and error. Sometimes, on things like light fixtures, the adjustments are located on the bottom of the detector housing. There are usually two adjustments, hang time, the time it stays on after being triggered, and sensitivity, how large a heat signature will cause it to trigger. I would not expect PIR detectors used as part of an alarm system would have external adjustments. Most likely, there is a tamper switch inside the housing which triggers the alarm if the case is opened and a sensitivity adjustment only inside since an alarm trigger does not need a hang time. As for the birds, there will be roosting points which the birds favor. For pigeons specifically, there are a number of deterrents. My favorite is the "bed of nails" outdoor carpet. This is a piece of outdoor carpet which comes in many colors, with straight pins sticking up through it for an inch or so. The pins are close enough together that the birds can't land without getting poked by a pin. You cut a piece to fit a roosting area and tack it down so it doesn't blow away, in a color to match the paint or whatever. I successfully used this on a house I owned in San Diego which had several pockets under the eaves where pigeons could nest, and did. Like with you, the law said I could not simply shoot them. The openings were too large to simply screen over, so the carper of nails on the sloped surface they used for a nest worked perfectly. There is another method, ultrasonic sound. Varmint repellents are wide area ultrasonic sound generators are used in barns to irritate mice and it happens it also irritates birds, barn swallows specifically, but for some reason, do not affect owls.



I think your best bet is to contact the alarm system installer and get them to adjust the sensitivity of the individual detectors, which I think will end up being the easiest solution. It is really hard to get pigeons to move on elsewhere.How to keep birds from setting off motion alarms?This has been a problem over centuries. You can try to place a decoy predator in the vicinity - like a plastic owl or hawk or other bird of prey. Removing/destroying any nests in the area. Remove food and water source if possible. Maybe lower the scan area of your sensors to something more ground level - Good Luck!How to keep birds from setting off motion alarms?You can look up someone in the phonebook in the animal section or put a net around the building. You could also by a motion dectector that only detects object over 100 pounds.How to keep birds from setting off motion alarms?
this sounds crazy use a something that makes a noise or something like that