A Bird Has Nested in My Dryer Vent

Yes, and this is the part people underestimate. A dryer vent blocked by nesting material stops exhausting properly, so heat and lint build up in the duct — and dryer lint is extremely flammable. Blocked dryer venting is a recognized cause of house fires. On top of that, a dryer that cannot exhaust runs longer, costs more, and can push moist air back into the house. If your dryer has suddenly started taking two or three cycles to dry a load in spring, check the vent before you call an appliance repair company.

Listen and look. Chirping or scratching from the wall behind the dryer, especially early morning, is the giveaway once the chicks hatch. Outside, look at the vent hood: nesting material poking out, droppings streaking the siding beneath it, and birds repeatedly landing at the same spot and disappearing. Inside, the dryer takes far longer than usual and the vent flap no longer opens when it runs. A vent hood whose flap is propped permanently open is nearly always holding a nest.

You can, but the timing matters and most people get it wrong. If there are live chicks in there, pulling the nest means either killing them or leaving them to die in the duct, which creates an odor and fly problem inside your wall. Reaching a nest in a duct run is also awkward and it is easy to compact the material further or damage flexible ducting. And if you clear it without fitting a guard, the same pair will rebuild within weeks — birds are extremely faithful to a site that worked.

The species that nest in vents here — European starlings and house sparrows — are introduced, non-native species, and they are generally treated differently from native birds under wildlife law. Native birds are broadly protected and their nests should not be disturbed. That distinction is exactly why identification matters before anyone touches a nest. We identify the species first and handle the work accordingly. Source: Wisconsin Department of Natural Resources wildlife regulations. Reviewed by Brian Zahringer, WI Commercial Applicator #103689 — August 2026.

To that same vent, yes, almost certainly — unless it is physically guarded. Starlings and sparrows return to successful nest sites year after year, and other birds will take an unguarded vent that has obvious history. This is the single reason vent nesting recurs: people clear the nest, feel the problem is solved, and find themselves doing it again the following April. The guard, not the clearing, is what ends it.

Because you stranded the mites. Bird nests carry large populations of parasitic mites that feed on the nestlings, and when the birds leave or the nest is removed, those mites disperse through the wall looking for another warm host. They cannot live on people but they will bite while searching. Biting that starts a few days after a nest is removed is the classic pattern — see our page on bird and rodent mites. It is a strong argument for treating the site as part of the removal rather than just pulling the nest out.

Same problem, slightly different consequences. A blocked bathroom exhaust means the moisture it was supposed to remove stays in the bathroom, which feeds mold, silverfish and springtails. A blocked stove or range hood vent means cooking exhaust is not leaving the building. Neither carries the fire risk of a lint-packed dryer duct, but all three need clearing and guarding, and all three are used by the same two bird species. We check every exterior vent on the building rather than only the one that was reported.

As much as the nest and its debris reached, which is usually more than the visible portion. Nesting material gets compacted well back into the run, and there is generally droppings and fine debris beyond it. Clearing only the hood leaves a restriction you cannot see and the fire risk largely intact on a dryer line. We clear the run, not the opening, and confirm the vent flap operates freely afterwards.

Not an ordinary insect screen, no — and this is a common well-meant mistake. Fine mesh over a dryer vent catches lint, blocks fast, and creates the same airflow problem the nest did. What is needed is a purpose-made vent guard that excludes birds while allowing full airflow and letting the damper operate normally. On a dryer line especially, the guard has to be the right type for the vent, and it needs checking periodically for lint accumulation.

Yes — vent nesting is one of the routine spring wildlife calls across the rural corridor, from Clintonville and Marion out through Manawa, Iola, New London and Waupaca. We identify the species, remove the nest and debris at the right point in the season, clear the duct, treat the site for the parasites left behind, and fit guards to every vulnerable vent on the building. It is a single visit for most houses and it does not need repeating the following year.