The Common Birds of Ohio field guide names the rock pigeon, European starling and house sparrow among only a handful of common, widespread birds in Ohio that are not native, and says the starling is probably the state's most abundant bird. These three are behind most bird problems at Columbus homes, and they are the species Ohio law exempts from its bird protections.
Each uses a home in its own way. Starlings are cavity nesters that favor exhaust vents, house sparrows tuck nests into crevices and soffits, and pigeons roost on sheltered ledges and rooflines. That is why a vent problem gets a different plan than birds roosting on a ledge.
Native birds need a different approach. Chimney swifts, for example, nest in Columbus-area chimneys each summer and are protected under the Migratory Bird Treaty Act, so their nests stay put until the young have left. Columbus Audubon notes that swifts typically arrive in Ohio in April and leave by October.
For your home, that means we identify the bird and the nest first, then match the removal, cleanup and protection to the species and the opening.