Birds roost in nooks and crannies of ornate buildings such as the Illinois capitol. Cleaning up their droppings and repairing damage they cause costs tens of millions of dollars each year.
Armed with spikes, electronic devices, cages, and cannons… building
maintenance supervisors across the nation try to protect their buildings
from being invaded. If they fail, the cost could be damage to the
building or to property inside. The Great Lakes Radio
Consortium’s Lester Graham reports: