When a bird invades your property it can be a unique and challenging problem. They are intelligent creatures and will make themselves right at home. The most common types of invaders are pigeons, sparrows, starlings, blackbirds, seagulls and raptors. We have all seen them around. For some people, they are just a nuisance or unsightly to have around the house or yard. Others, however, find themselves in the middle of a real nightmare because these birds can become aggressive and can carry disease.