Reviewed by William "Willy" Vizcarrondo, NYS DEC Certified Commercial Pesticide Applicator C1825832. Updated September 23, 2026.
Short answer
Usually yes, but identify the bird first. Most dryer vent nests on Long Island are house sparrows or European starlings, which the U.S. Fish and Wildlife Service lists among the nonnative species the Migratory Bird Treaty Act doesn't cover, so their nests can be removed any time. A native bird's active nest with eggs or young is federally protected and has to wait. Either way, the vent needs a proper cover afterward.
The ones that like cavities. A dryer vent is a warm, dry, sheltered tube with a small entrance, which is exactly what a cavity nester wants, and the two cavity nesters most common around Long Island houses are the house sparrow and the European starling. Both were introduced from Europe, and the Fish and Wildlife Service's revised list of nonnative bird species to which the Migratory Bird Treaty Act does not apply includes both, along with the rock pigeon. Native cavity nesters such as wrens, chickadees and bluebirds occasionally use a vent too, and the act protects them, their active nests, eggs and young. A small brown bird with a gray cap and black bib is a house sparrow; a glossy dark bird with a yellow bill and speckles is a starling.
Because lint and straw in a heated tube is a fire waiting for a season. A nest in a dryer vent blocks airflow, which makes the dryer run hot, packs lint behind the nest and can push exhaust and moisture back into the house. It also brings bird mites and droppings into the duct. A bathroom exhaust vent with a nest does the same thing with moisture instead of heat. The nest usually sits just inside the flapper, where the bird could squeeze past a broken or missing louver, and pulling it means opening the duct at the outside cover or disconnecting it behind the dryer and clearing the whole run, not just the entrance.
A vent cover the bird can't get through and the lint can. Louvered dryer vent caps get stuck open with lint and that's when the sparrow moves in, so the fix is a cap with a proper spring-loaded flap or a cage guard sized so lint still clears, and it gets checked each spring. Never put fine window screen over a dryer vent; it clogs with lint and creates the fire risk you were trying to avoid. Bathroom and kitchen exhaust vents get a screened cover with quarter-inch or larger mesh. Then the other holes get looked at: the gap behind a gutter, the open soffit vent, the attic louver with a missing slat, because a sparrow that lost one cavity takes the next one.
The vent nest call comes in April and May from all over Nassau and western Suffolk, from Levittown and Massapequa ranches with the dryer vent at grade to Garden City and Rockville Centre colonials with a bathroom vent on the second floor. Nine times out of ten it's house sparrows. Bobby Bugs identifies the bird, removes the nest and the debris behind it, and installs a proper vent guard; birds' nest removal carries a 6-month written guarantee.
Related
It depends on the bird. Active nests of native birds are protected under the Migratory Bird Treaty Act. The Fish and Wildlife Service's list of nonnative species the act doesn't cover includes the house sparrow, European starling and rock pigeon, which are the birds in most vents, gutters and soffits on Long Island. When it's a native bird with eggs or young, the nest stays until they've fledged and the opening gets sealed afterward.
Watch it for a day. Adults going in and out with food, or chirping from inside, means eggs or chicks. A quiet nest in late summer or fall is finished and can come out regardless of species.
Yes. The nest blocks exhaust airflow and traps lint against a hot duct, which is a recognized fire risk. If the dryer is taking longer to dry, the outside flap isn't moving when it runs, or the laundry room is warm and humid, check the vent now.
Still not sure? Call (516) 509-6001 and we'll tell you what you're dealing with.