Some birds cause considerable damage to properties, persons and themselves in a man-made environment. Starlings, crows and feral pigeons attack crops, raid garbage cans and defecate on people and property. You must identify the attracting agents. Food, water and habitat are high on the list. Simple homemade deterrents can be installed to fit your particular problem. Keep in mind that many birds are protected species, and your purpose is to ward off or stop offending activities without harm them.
Keeping Birds Away
Make deterrents from items already in your home. One of the earliest is the scarecrow farmers use to keep crows and blackbirds from his crops. You can make simple aluminium foil, pans or old CDs and post them around your garden. When the wind blows, they make noise, as well as reflect the sun, which scares birds.
Other devices, such as nets and chicken wire, protect plants, flower boxes and personal property.
Soaking crushed hot chilli peppers in water for several days and then spraying bird-infested areas is effective.
Eliminating what the birds seek in the first place is a good deterrent. Disposing of bird habitats or shelter from the weather can be addressed by closing or restricting access to openings, repairing broken windows and blocking off areas were active nesting and roosting are noticed to take place.
Special Methods of Deterring Bird Population
Set up carbide cannons up on timers to fire every hour or so to scare feeding birds from your garden or farm crops. Pigeon box traps can easily be built to set on ledges for the bird. Netting can be made out of old fishing seines for restricting bird access, sticky glue from caulking and petroleum jelly placed on ledges, or spikes made from nails in boards keep birds from landing. One of the best and most effective homemade deterrents is strands of fishing line over ponds and open reservoirs placed about 25-50 yards apart. This works to deter birds such as ducks, geese and sea gulls. They will not fly under the lines.
Other deterrents include stuffed owls, rubber snakes, cats, dogs, balloons or beach balls with eyes painted on them, or cut outs painted to look like raptors. You can deter geese by floating a few swan decoys on your pond.