Chasing and rock throwing may also be effective. Whistle bombs make a continuous whistling noise and shell crackers travel up to 100 yards before exploding. The above devices were developed specifically for animal damage control but before using any exploding scare device, check with law enforcement authorities to make sure no local ordinances are being violated. Information about availability of the above scare devices can be obtained from Animal Damage Control Agents of the U.S. Department of Agriculture and the Department of Conservation. Firearms, fireworks and blank pistols are more readily available and can also be effective.
Safety is a consideration when using firearms or fireworks.
Firearms should be used only for scaring. Care must be taken to shoot in a safe direction and not directly at the problem birds. Automatic exploders produce a loud blast but no projectile is fired. They can be purchased or, if available, borrowed from state and federal wildlife personnel. A source of propane gas is needed for the gas exploders.