Bat Removal & Exclusion in Ithaca, NY

Bats in your Ithaca home

The bat of Ithaca houses is the big brown bat. It hunts moths and beetles over Cayuga Lake, the inlet and the gorge creeks at dusk, and it roosts by day in warm, still attics — the carved-up hill houses with their layered roofs, and lake cottages that stand empty and undisturbed for weeks. Colonies enter through gaps most homeowners would swear are too small: a lifted ridge shingle, a warped gable vent, a finger's width at the chimney.

Bats are protected in New York, and they are one of the DEC's three rabies-vector species, so this is specialist work under the DEC nuisance wildlife control operator license. The method is never poison and never extermination — there is no legal or sensible version of that. The method is one-way exclusion, done in the season when it harms no bats, and patience when the calendar says wait.

Seasons rule this job

In early to midsummer, colony pups are born flightless and stay in the roost while their mothers hunt. Excluding then would seal the exits against the adults and strand the young inside, so exclusion waits until the pups are flying with the colony. From fall through early spring, big brown bats hibernate — often right in the attic — and disturbing or shutting in a sleeping colony is just as wrong. Fall is the prime window here: the young are airborne, the colony is still active, and the work can be finished before hibernation begins.

The endangered bats get left alone

Two bats found in this region — the Indiana bat and the northern long-eared bat — are endangered and listed by the state and federal governments. They are mostly bats of caves, mines and trees rather than houses, but identification matters before any exclusion, and if a listed bat is involved, the DEC's direction governs and the animals are left alone. It is one more reason bat work starts with knowing exactly which species is in the roost.

How colonies use Ithaca houses

A maternity colony needs warmth, so summer roosts sit high in sun-warmed roof peaks — one reason the tall hill houses and their south-facing dormers are favored. Seasonal cottages give colonies the other thing they need: quiet. A lake house closed from October to May can host bats through hibernation and into pup season without a single human noticing. Droppings collecting below a vent, staining at a ridge line, and chirping at dusk are the usual first evidence.

What an exclusion actually involves

Every gap on the building is found and sealed except the colony's working exits. There, our crew fits one-way exclusion fittings — devices that let bats pour out at dusk to hunt the lake and shut against them when they return. Over several nights the colony relocates itself to a natural roost. Exit watches confirm the attic is empty, the fittings come down, and the last openings are sealed permanently. Done in the right weeks, the bats are unharmed and the house is closed to their return.

A bat in the living space

A single bat flapping through a bedroom is usually a young bat that took a wrong turn through a chimney or an open vent, not proof of a colony — though it is always worth checking the attic. Do not handle it with bare hands. Close the room if you can and open an exterior window or door, or call us for help. If the bat was in a room with a sleeping person or a pet got to it, talk to your doctor or veterinarian about the exposure; that question is medical, and it matters more than the bat itself.

Guano and the cleanup after

Under a long-used roost, droppings build up in the insulation, and dried guano can carry fungal spores that nobody should breathe as dust. Cleanup is done with protection, without dry sweeping, and contaminated material near the roost comes out. Not every Ithaca attic needs deep restoration — a small, new roost is a modest job — and we will show you what is actually up there before talking about how much cleanup your place needs.