Pigeons

As well as posing a risk to humans due to its acidic content, Pigeon/ bird fouling is extremely corrosive and over a relatively short period of time will eat into the fabric of the building causing deep staining which can only be removed by a specialist cleaning contractor. Window frames, cladding and especially metal guttering are particularly at risk and a heavy infestation can ruin an expensive refurbishment or new building in only a few months resulting in expensive repairs. If birds are proving a pest, from fouling to noise pollution, causing destruction and spreading disease, there's no doubt that they can cause serious problems.

Gulls

In inland areas, especially outside the breeding season, gulls often roost in many thousands on large bodies of water such as reservoirs or flooded gravel pits. When inland, are largely dependent on domestic refuse for food. Herring gulls and lesser black-backed gulls are becoming increasingly important pests as they have changed their behaviour over the last two decades, to nest more and more on buildings rather than on natural coastal areas.