Bird fouling or guano contains the various bacteria and the spores from the bacteria can become airborne. When these spores are breathed in they can be extremely hazardous.
In January 2019, the cryptococcosis fungal infection caused by pigeon droppings in a machine room, was a contributing factor to the deaths of two patients at a Glasgow hospital. More can be read on this story here:
People with compromised immune systems are particularly at risk as once the bacteria enters the blood stream it can cause lung infections, sepsis, meningitis, encephalitis and sometimes even lifelong illness or death.
In 2017 the biggest listeriosis outbreak in the world occurred in South Africa when 1,065 cases of listeriosis were confirmed and 218 deaths were caused by contaminated food originating in a factory owned by South Africa’s largest food company Tiger Brands. While it is unsure where the listeriosis originated, it is an example of the destruction a disease carried by birds can cause.
Bird control is not only necessary in order to keep our environments healthy and to prevent disease, but also to prevent secondary infestations such as rodents (which also carry diseases), maggots, flies and bird fleas.
Birds thrive in an urban environment and only require the smallest amount of shelter on buildings. All birds can cause damage to buildings through nesting activity and by eroding surfaces with their faeces which contains uric acid, eventually this causes water ingress to buildings. Solar Panels are also at risk of damage as they are often used by pigeons and seagulls for shelter. Fouling on the surface also reduces their effectiveness