Adult gulls are typically white, with varying patterns of gray and black over the back, wings, and head. They are robust birds that are approximately 40 cm in length with a wingspan of 1 m.

Habits & Behaviours

Gulls are migratory birds found throughout Ontario. Flocks of gulls can be found scavenging for food everywhere and anywhere, but especially in dumps or landfills, parking lots, beaches, parks, courtyards, farms, or any area there is a viable food source. Gulls will find a secluded spot to spend the evenings and sleep; including cliffs, small islands, tall buildings, other tall structures, and even the roof of your home or business. Gulls have been known to travel several miles from where they sleep to where they forage.

Complaints & Destruction

Gulls like to land and rest on the roofs of homes, buildings, boats, and businesses. Gulls can deface your property with their excessive and unsanitary droppings on sidewalks, parking lots, window ledges, balconies, vehicles, street lights, and exteriors of residential, recreational, and commercial properties. Their droppings are highly corrosive and can eat through many different surfaces. Gulls and their feces are carriers of bacteria, viruses, and a variety of parasites which may present a health hazard.

Major Risks & Dangers

Fires Hazards

There is a very high risk of fire to Gull nests constructed near electrical boxe/wires as nests consist of materials that are highly flammable.

Health risks

Gulls carry allergens, parasites, bacteria, and other health risks to humans. Their droppings contain infectious diseases such as E. coli, cryptococossis and histoplasmosis. Droppings on pavement can become slippery when wet and pose a safety hazard to passing pedestrians. Furttermore ,  failure to clean will allow feces  to be tracked into properties. Gulls carry parasites such as fleas and ticks. Dead and decomposing gulls can cause displaced parasites, other pest infestations and can contaminate the water supply.

Structure & surface damages

Gulls’ destructive nesting habits and highly corrosive droppings can cause extensive damage to roofs, lamp and light posts, balconies, and other surfaces of properties.

Machinery, equipment & vehicle damages

Gull droppings and debris can also extensively damage industrial machinery, other various equipment and vehicles and cause humans operating or servicing the machinery, equipment, etc. to become exposed to serious health risks.


Gulls are monogamous birds that tend to mate for life. They breed in the spring and typically raise one brood annually that consists of a clutch of one to five young. Both the female and male take turns incubating the eggs and incubation normally lasts between 22-26 days. The young are nourished by both parents during the first weeks of life. The young are ready to leave the nest at approximately two weeks and will be ready to start breeding between the ages of three and seven years old

Eating Habits

Gulls are carnivorous scavengers and will eat everything from dead fish, field mice, insects, garbage, and any food in sight.


To reduce the risk of gulls resting, scavenging or nesting around your residential, recreational/cottage or commercial property, bird proofing/exclusion is the best prevention.

Greenshield Pest Control Inc. can provide you with many bird proofing/exclusion services and solutions.


Due to the dangers associated with bird feces you should never attempt to exclude a bird infestation  yourself. If you have a flock of gulls roosting/nesting in or on your residential, recreational/cottage or commercial property, it is best to let the professionals do the job of safely and humanely removing the birds, decontaminating the areas affected and provide you with exclusion/proofing services to prevent further infestations. Please contact us today or see our Bird Control Services section for further information on the types of services and solutions we can provide.

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