Getting birds out of your attic requires identifying how they’re getting in, waiting for the right moment to act, and then sealing every entry point so they can’t return. The process is straightforward if no eggs or chicks are involved, but an active nest with babies changes your timeline and your legal options significantly. Here’s how to handle it from start to finish.
Confirm You’re Dealing With Birds
Birds in an attic sound different from mice or squirrels. You’ll hear chirping, flapping wings, and rustling, especially around dawn and dusk when birds are most active coming and going. If there are babies in a nest, expect persistent, high-pitched chirping throughout the day as chicks call for food. You may also notice droppings near your roofline, stray feathers, or nesting materials like twigs, leaves, and bits of string collecting near vents or soffits.
The most common attic invaders are house sparrows, European starlings, and pigeons. These three species happen to be the only ones exempt from federal protection under the Migratory Bird Treaty Act of 1918. Nearly every other wild bird species is legally protected, meaning you cannot disturb, relocate, or destroy their nests, eggs, or young. Violating this law carries real penalties. If you’re unsure what species you’re dealing with, a quick look at the birds entering and exiting your roofline (or a photo sent to your local Audubon chapter) can help you identify them before you take action.
Find Every Entry Point
Birds typically enter through gaps in soffits, damaged fascia boards, uncovered ridge vents, and broken or missing vent screens. Dryer vents, bathroom exhaust vents, and gaps around plumbing stacks are also common entry points. Moisture damage and ice dams can soften wood along the roofline, creating openings that weren’t there when the house was built.
Walk the perimeter of your house and inspect the roofline from ground level with binoculars, looking for visible holes, damaged screens, or spots where birds are flying in and out. Inside the attic, look for daylight coming through gaps. Mark every opening you find. You’ll need to seal all of them eventually, but during the removal phase, you’ll leave the primary entry point open.
Check for Active Nests First
This step determines everything else. If there are eggs or unfledged chicks in the nest, you generally cannot remove it. For protected species, federal law prohibits disturbing an active nest. Even for unprotected species like sparrows and starlings, removing a nest with helpless chicks inside means those birds will die, which most people understandably want to avoid.
Most birds breed between February and August, though timing varies by region and species. Chicks typically fledge (leave the nest) within two to three weeks of hatching. If you discover an active nest with babies, the most practical approach is to wait for the young birds to leave on their own, then immediately seal the entry points. This delay is usually a matter of weeks, not months.
If the nest is empty, contains no eggs, or belongs to house sparrows, starlings, or pigeons, you can proceed with removal right away.
Use a One-Way Exclusion Device
The most reliable removal method is a one-way exclusion door. This is a simple device you mount over the birds’ primary entry point. It lets birds fly out but prevents them from getting back in. Commercial options like the BirdChute are designed for sparrows, starlings, and similar-sized birds and attach over dryer vents, soffits, and other openings with pre-drilled screw holes.
Before installing the exclusion device, seal every other entry point you identified. Use steel wool combined with caulk for small gaps. For larger openings, cover them with hardware cloth (galvanized wire mesh) with openings no larger than 1/4 inch. This mesh is strong enough to keep birds out while still allowing airflow through vents. Avoid using spray foam alone, as it degrades over time and animals can peck or chew through it.
Leave the one-way device in place for at least a week to ensure all birds have exited. Watch the roofline during early morning and evening hours to confirm no birds are still entering. Once you’re confident the attic is empty, remove the exclusion device and permanently seal that final opening with hardware cloth or metal flashing.
If You Need to Remove Birds Directly
Sometimes a one-way device isn’t practical, such as when a bird is trapped and disoriented inside a large attic space rather than nesting near a vent. In that case, try opening any attic windows or creating a clear path to an exit point. Darken the attic as much as possible and leave a single opening with bright light on the other side. Birds naturally fly toward light. Give the bird time and space rather than chasing it, which causes panic and can injure both you and the bird.
For protected species that are injured or truly stuck, contact a licensed wildlife rehabilitator in your area. These are the only people legally authorized to handle native wild birds.
Health Risks From Bird Droppings
Bird droppings in an attic aren’t just unpleasant. They can harbor a fungus called Histoplasma capsulatum, which causes histoplasmosis when its spores become airborne. Symptoms appear 3 to 17 days after breathing in spores and include fever, chills, and headache. In most healthy adults, the infection resolves on its own. But in children under 2, adults over 55, and anyone with a weakened immune system, it can become a severe, even life-threatening illness that spreads to the liver, brain, and other organs.
The critical rule: never sweep, vacuum, or dry-disturb bird droppings. Any of these actions launch spores into the air. Use only wet cleaning methods.
How to Clean Up Safely
Before entering the attic for cleanup, put on proper protective gear: a respirator with HEPA filter cartridges (not a simple dust mask), nitrile or vinyl gloves, eye protection, disposable coveralls, and shoe coverings. Mix a disinfectant solution of one part household bleach to ten parts water in a spray bottle.
Thoroughly soak all droppings and nesting material with the bleach solution before touching anything. Let it sit for several minutes, then wipe everything up with a sponge or rag that’s also been soaked in the disinfectant. Place all contaminated material, along with your gloves and coveralls, into a sealed plastic bag and dispose of it in your regular trash. Wash any reusable cleaning tools in the disinfectant solution, then rinse. Wash your hands with soap and hot water even though you wore gloves.
If the accumulation is heavy, covering a large area or built up over months or years, professional cleanup is worth the investment.
Seal Your Attic Permanently
Once the birds are out and the mess is cleaned, your goal is making sure this never happens again. Cover all intake and exhaust vents with 1/4-inch galvanized hardware cloth, secured with screws rather than staples. Replace any damaged or rotted fascia boards and soffit panels. Check that ridge vent caps are intact. If you have exposed plumbing stacks on the roof, consider upgrading the pipe boot flashing to galvanized steel, which birds and rodents can’t break through the way they can with lead or plastic versions.
Inspect these areas at least once a year, ideally in early fall before nesting season begins again in late winter. Pay extra attention after storms or heavy snow, which can loosen flashing and crack soffits.
What Professional Removal Costs
If you’d rather not handle this yourself, professional bird removal from an attic typically runs $300 to $600 for nest removal alone. Costs vary depending on species and severity. Pigeon infestations involving large flocks can reach $1,000 to $3,000 because of the volume of waste and the number of birds involved. Removal from a specific vent runs $200 to $500 per vent, while chimney removal with a cap installation costs $175 to $800.
Professional cleanup adds $50 to $300 on top of removal fees. Preventive measures like bird spikes start around $20 for a 10-foot section, and netting for a 25-by-25-foot area runs about $100. For a full removal, cleanup, and prevention package on a larger home, expect to pay anywhere from $600 to over $2,000. The average homeowner spends around $600 total.