In large numbers, birds such as the feral pigeon can become quite a real burden. They typically nest in trees or rooftops, and their droppings can damage property and spread disease. Once they choose your roof as their roosting location, pigeons will begin to breed rapidly. Fortunately, it is effortless to determine the presence of birds and keep them away from your property. Numerous deterrent solutions are available, from nets and traps to spikes and other bird-repellent products.