Bird Nest in Your Dryer Vent: What to Do on Long Island

Stop using the dryer, confirm which bird it is, and remove the nest from the outside as soon as you legally can. Then clear the whole duct, not just the hood, and put a louvered metal cap on the vent so it does not happen again next March.

The dryer part is not optional. A nest of dry grass sitting in a duct full of lint, with hot air pushing through it, is the setup for a dryer fire. The U.S. Fire Administration estimated about 2,900 clothes dryer fires in residential buildings a year in its national study, and its current guidance still lists failure to clean as the leading factor in roughly a third of dryer fires. Run the dryer with a nest in the line and you are drying clothes with the exhaust blocked.

Do not push the nest deeper with a broom handle and do not spray anything into the duct. Both make the removal harder and the second one puts chemicals in a line that blows into your laundry room.

Only if it is an active nest of a protected native bird. The U.S. Fish and Wildlife Service is clear that nonnative species such as European starlings, rock pigeons, and house sparrows are not protected under the Migratory Bird Treaty Act, and New York's Environmental Conservation Law section 11-0103 defines the English sparrow, the starling, and pigeons as unprotected wild birds. Those nests can be removed any day of the year, eggs included.

Native songbirds are a different story. Under the Migratory Bird Treaty Act it is illegal to destroy a nest that has eggs or chicks in it, or young that still depend on the nest. The Fish and Wildlife Service says you are usually required to wait until the nest is inactive before removing it. Robins, wrens, and chickadees rarely choose a dryer vent, since it is hot, vibrates, and smells like fabric softener, but it happens. If that is what you have, the wait is measured in weeks, not months. Cornell's All About Birds lists a 12 day incubation and a 21 to 23 day nestling period for starlings, and 10 to 14 days for each stage for house sparrows, so even a slow nest is empty in a month or so. We are not lawyers and this is not legal advice; it is the rule we work by, and if the nest is a protected active one we schedule the removal for after it empties.

Starlings and house sparrows, almost every time. Both are cavity nesters that treat a 4 inch dryer duct like a hollow tree. All About Birds describes starling nests as virtually always in a cavity, typically in a building or other structure, and house sparrows as nesting in holes of buildings and other structures. Starlings raise 1 to 2 broods a season and house sparrows 1 to 4, which is why a vent nest that goes unaddressed in March gets reused all summer.

Telling them apart: a starling is chunky, dark and glossy with a yellow bill in spring and a short tail, and its nest is a messy pile of grass and straw with feathers and trash worked in. A house sparrow is small and brown, the male with a black bib, and the nest is a loose dome of dried grass. A robin has the rust orange breast and a wren is tiny and brown with an upturned tail. Neither of those two should be in a dryer vent, but check before you pull anything out.

Because the vent is a warm, dry, predator-proof cavity with a flap that a starling can pry open in seconds, and because the same birds come back to the same opening every year. A plastic flap that sticks open, a hood with no flap at all, or a cap that fell off two winters ago is an open invitation. The lint inside is nesting material already delivered.

Walk the outside of the house in late February, before nesting starts. Check the dryer vent, the bathroom and kitchen exhaust vents, the soffits, the chimney, and any gap where a cable or pipe enters the wall. If a flap is stuck or a screen is gone, that is the hole they will use.

Yes. A blocked exhaust traps heat and lint in the duct, and dry nest material is fuel. The Consumer Product Safety Commission's advice is to clean the dryer vent and exhaust duct periodically and to check the outside vent while the dryer is running to make sure exhaust air is escaping. The U.S. Fire Administration adds a line that is exactly this situation: check periodically to make sure nests of small animals and insects are not blocking the outside vent.

If your clothes have been taking longer to dry, the laundry room feels humid, or the outside flap does not move when the dryer runs, treat the vent as blocked until you have looked.

Phone assessment. We ask what you are seeing at the hood, whether you hear birds in the wall, and whether the dryer is still venting. Most vent jobs are quoted from that call.

Species and activity check on site. We confirm which bird it is and whether the nest is active. Starling and sparrow nests come out that day. A protected native nest with eggs or young gets scheduled for after the birds leave, usually two to five weeks out.

Removal from the exterior. The nest and all nesting material come out through the hood, never pushed inward.

Full duct clearing. We clear the run from the hood back to the dryer connection so no packed lint or nest material is left behind the wall.

Sanitizing. The hood and the first section of duct are treated. Starling and sparrow nests carry bird mites, and University of Minnesota Extension notes that when a nest is abandoned the mites look for other hosts and may enter homes.

Metal cap. A louvered metal cap or the correct exclusion screen goes on the vent. This is the part that keeps them out.

Written 6-month guarantee. If a bird gets back into a treated opening within 6 months, we come back at no charge. Most vent jobs are done in one visit.

Put a louvered metal cap on it and keep the duct clean. The cap has to be one designed for dryer exhaust: a fine mesh screen over a dryer vent clogs with lint in a season and creates the exact fire risk you were trying to avoid. The louvers close when the dryer is off and open under airflow, which a starling cannot pry.

Cap the bathroom and kitchen exhaust vents at the same time, since a bird that loses the dryer vent moves ten feet over. Then clean the dryer duct periodically, as the CPSC recommends, and more often if the run is long or has elbows. Clean duct, metal cap, no birds.

The quote depends on whether the nest is active and protected, how long the duct run is, how much material is packed behind the wall, and whether the vent needs a new cap or a hood replacement. Bobby Bugs quotes every job in writing before any work begins, the invoice matches the quote, and treated openings carry a 6-month written guarantee. If the nest is in a soffit or gutter rather than a vent, see our bird nest removal service page for the full scope.