Cycles Not a true migrating bird, starlings may move from rural trees to warm city buildings in winter. The daily cycle is one of leaving the nest at sunrise to travel up to sixty miles to feeding areas before returning for the evening. They disperse to mate in the spring. After mating season, they will often coalesce into huge flocks with defined feeding and roosting areas. Damage Starlings rank just behind pigeons as an urban bird pest.
Starlings are a major nuisance in urban areas due to their nestling, eating and living habits.
When the bird is in its flocking phase, thousands of starlings often overwhelm urban buildings. Large scale buildup of feces from these flocks will lead to structural damage. The uric acid in the feces will 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 serious health risk.