Number of different bird species often form these pests. They include the house sparrow, starlings, collard doves, seagulls and pigeons. These usually become pests when they build their nests in human living or workplaces and feed all available food. Bird can contaminate food production and inventory when they nest in ware houses.

Their feeding and dropping makes them a nuisance, The pigeon is the number one urban bird pest. They exist in large numbers in every city across the country. Pigeons are not afraid of people; they roost and nest readily in human made structures and they have a diverse diet. The standard pigeon has a short neck, short legs and compact body. Pigeons are responsible for heavy damage each year in cities. The uric acid in their feces is highly corrosive. Roosting flocks damage in roof, air conditioning unit and roof top machinery in common building.