Crows and Blue Jays

Noise Devices

The available frightening devices include, but are not limited to, propane or acetylene exploders, rifles, shotguns, firecrackers, shell crackers - used with shotguns, noise bombs - fired from specially adapted launching pistols, recorded alarm cries and electronically produced alarms (av-alarm). These devices are effective on areas of twenty acres or less. Large orchards will require several devices.

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