Dryer vents are small, warm, enclosed spaces perfect for birds to build nests. That cozy warmth that we love in winter makes vents inviting for birds. Unfortunately, when birds use a dryer vent for nesting, they bring twigs, grass, and feathers into your ductwork – often damaging the vent lining and blocking airflow. In this Morristown home we serviced, a bird’s nest packed the entire vent pipe, cutting off airflow almost completely. Nesting birds can chew through flimsy flex-hose vents or pull plastic lining apart as they add material, creating holes and gaps in the vent. Over time this damage can let cold air, bugs and even more pests into the duct, all while shrinking your dryer’s airflow. The result? a fire hazard and a halt to dryer usage. (Indeed, dry twigs and lint can ignite easily when mixed with the vent’s hot ) Our team sees real cases like this, homeowners have found twigs and eggs in their vents – a clear sign of trouble.
Why Birds Nest in Dryer Vents
Birds naturally look for protected cavities to raise their young. A dryer vent – especially in winter or during rain – is just that: a sheltered nook warmed by escaping laundry heat. Species like starlings, sparrows, and pigeons have been known to sneak into vents on home exteriors. Once inside, they build messy nests of sticks and leaves. For homeowners, this seemingly small problem has big consequences: blocked airflow and constant moisture can lead to mold or even carbon monoxide buildup in gas dryers. In one recent Morristown job, our inspection found the vent clogged with a bird’s nest so large it nearly spanned the entire length of the duct, forcing the dryer to overheat on every cycle.
Dangers and Damage from Nesting Birds
When birds nest in your dryer vent, the risks multiply:
Fire Hazard: Birds use dry, combustible materials (twigs, leaves, paper) to build nests, and these can easily catch fire from hot air or stray sparks in the vent. Lint from the dryer mixes with nesting debris, creating a tinderbox. Several dryer vent cleaning experts warn that a blocked vent dramatically raises fire risk.
Blocked Airflow & Efficiency Loss: A clogged vent forces your dryer to run longer and hotter. Bird nests cut off airflow, making the dryer overheat and work overtime. This drives up your energy bills and causes wear on the machine. We’ve seen almost all dryers with instances of any blockage take nearly twice as long to dry loads.
Physical Damage & Costly Repairs: As birds scratch and nest-build, they often tear at the vent lining or even break vent covers. Wildlife pros report that nests can cause cracks, warped duct sections, or detached vent covers, forcing expensive repairs. Regular maintenance saves you money: ignoring lint or bird debris “can lead to costly problems” later.
Health Risks: Bird nests carry mites, bacteria and droppings. Trutech Wildlife notes that humid, decaying nests in vents can harbor histoplasmosis and other pathogens. When your dryer blows air, it could circulate these germs and allergens indoors, causing allergies or illness. In one study, homeowners noticed itching and odors from contaminated vents.
Other Pests: A nest is like a welcome sign for pests. Mice, rats or insects may be attracted to the nest materials or the entry point, compounding the problem. A vent nests often lead to further infestations – a secondary problem that means even more cleanup and repairs
Don’t wait until you find chicks in your laundry room. If you’ve noticed any signs of bird activity in your vent, or if it’s been a while since a professional inspection, give your dryer vent some TLC now. A clean, well-sealed vent means peace of mind – and no birdies on the lint filter.
Sources: Information from wildlife control specialists on bird nesting hazards trutechinc