Birds

Crows

Crows are frequently a big agricultural pest bird due to their fondness for corn and other farm crops, but they are a minor urban pest compared to the pigeon, starling or house sparrow. These birds can overwhelm trees, creating a lot of noise and harassing people and animals in the vicinity which can be a nuisance to the suburban resident. Furthermore, like any pest bird, dropping buildup can lead to structural damage from the uric acid while also posing a health risk due to the harborage of disease.

Pigeons

Feral pigeons are responsible for untold millions of dollars of damage each year in urban areas. The uric acid in their feces is highly corrosive. Also, debris from roosting flocks can build up, backing up gutters and drains thus causing damage to roofs and other structures. Extensive damage to air conditioning units and other roof top machinery is commonplace. There are also other economic costs that can be associated from pigeon’s taking up residence such as slip and fall liability and projection of an unclean, dirty company image. Besides physical damage, the bacteria, fungal agents and ectoparasites found in pigeon droppings sometimes represent a health risk.

Sparrows

The House sparrow is the number two urban pest bird. Introduced as a species to North America, the house sparrow quickly spread across the country due to its lack of natural enemies and its adaptive traits. Its ability to nest in urban structures, eat urban scraps and a large breeding capacity are some of these adaptive traits. They are boisterous, intelligent birds who roost in noisy flocks on branches of city trees, ivy covered walls and under eaves of houses.

Starlings

Starlings rank just behind pigeons and sparrows as an urban bird pest. Starlings can be a nuisance in both urban and rural areas due to their nesting, eating and living habits. When the bird is in its flocking phase, thousands of starlings often overwhelm buildings and trees. Large scale buildup of feces from these flocks can lead to structural damage. The uric acid in the feces can corrode stone, metal and masonry. Gutters and drainage pipes clogged with starling nests often backup, causing extensive water damage. The bacteria, fungal agents and parasites in the feces also pose a health risk.

Swallows

Swallows can be a nuisance in suburban areas due to their nesting habits. The mud nests damage and deface the outer walls and eaves of residences and office buildings. Building sides often end up smeared with feces from the bird colony along with collecting on the ground. Homeowners have also reported problems with parasites entering the house through building cracks next to the nests which poses a potential health risk to humans and animals.