The Hidden Damage Caused by Nesting Birds : Critter Control of Southern Maine

At first glance, birds nesting around your home may seem harmless or even charming. But while many of these feathered visitors are protected by law and admired for their beauty, the truth is that nesting birds can cause surprising amounts of damage—often in places homeowners least expect. From clogged gutters to fire hazards and structural deterioration, birds can create serious issues that are costly to fix and risky to ignore.

Nesting in Vents, Chimneys, and Attics

Birds often seek out quiet, elevated spaces to build their nests—making dryer vents, chimneys, soffits, and attic spaces prime real estate. Unfortunately, once inside, they can damage insulation, wiring, and even the structure of the home. Their nesting materials are highly flammable and can obstruct airflow, raising the risk of fire or poor indoor air quality.

Pigeons, starlings, and house sparrows are particularly notorious for nesting in these areas. Once settled, they’re difficult to remove due to both physical access challenges and legal restrictions protecting certain species during nesting season.

Water Damage and Roof Rot

Bird nests placed in gutters and downspouts can block proper drainage, causing rainwater to back up and pool on your roof. Over time, this leads to water intrusion, shingle deterioration, and rotting roof structures. Moisture damage may also encourage mold growth, which can spread inside the home and affect indoor air quality.

Corrosive Droppings and Structural Decay

Bird droppings aren’t just unsightly—they’re acidic and can corrode paint, metal, wood, and even concrete. Over time, accumulation on roofs, balconies, and siding can weaken structural materials and lead to costly repairs. On commercial properties, bird waste can also damage HVAC systems and create slip-and-fall hazards on walkways.

Health Risks to Humans and Pets

Beyond the physical damage, nesting birds can pose serious health risks. Their droppings can carry diseases such as histoplasmosis, salmonella, and cryptococcosis. Nesting materials may harbor mites, fleas, and ticks, which can enter the home and affect both people and pets.

Prevention and Safe Removal

Preventing bird damage starts with early detection and exclusion. Common strategies include:

Installing vent covers and chimney caps
Sealing entry points under eaves and rooflines
Trimming back tree branches near the home
Cleaning gutters regularly
Installing deterrents such as bird spikes or netting

Because many bird species are federally protected under the Migratory Bird Treaty Act, it’s important not to disturb active nests without professional guidance. At Critter Control of Southern Maine, we’re trained to safely and legally address bird-related issues using humane and effective solutions.

Let Us Help Protect Your Home

If you’ve noticed birds nesting around your home or signs of damage, don’t wait until the problems multiply. The team at Critter Control of Southern Maine offers expert inspection, exclusion, and cleanup services to keep your home safe from hidden bird damage—all while respecting local wildlife laws.