How to Keep Birds Out of Barn: Effective & Humane Methods

If you're wondering how to keep birds out of barn, the most effective approach combines physical barriers, deterrents, and habitat modification. A proven long-term solution is installing bird netting or wire mesh to block access, especially around eaves, rafters, and ventilation openings where birds commonly roost. This method—often referred to as keeping wild birds away from barn structures using exclusion techniques—not only prevents nesting but also reduces health risks from droppings and parasites. When combined with visual scare tactics, sound emitters, and proper sanitation, these strategies form a comprehensive bird control plan tailored for agricultural buildings.

Understanding Why Birds Invade Barns

Birds such as starlings, house sparrows, and pigeons are naturally drawn to barns because they offer shelter, warmth, and protection from predators. These structures mimic ideal nesting environments: enclosed spaces with high perches, minimal human disturbance, and often easy access to food sources like spilled grain or livestock feed. During breeding season, which typically runs from early spring through summer, birds become especially motivated to claim territory inside barns.

The presence of birds may seem harmless at first, but it can lead to significant problems. Accumulated droppings not only create unsanitary conditions but also corrode metal fixtures and compromise air quality, posing respiratory risks to both animals and humans. Furthermore, nests built near electrical wiring present fire hazards. Recognizing these risks underscores the importance of proactive measures in how to keep nuisance birds out of farm buildings.

Physical Exclusion Methods That Work

The gold standard in bird control is exclusion—preventing access altogether. Unlike temporary deterrents, physical barriers provide permanent solutions when properly installed.

• Bird Netting: Heavy-duty polyethylene or nylon netting can be suspended beneath rafters or attached across open doorways and windows. It should have a mesh size no larger than 1 inch to prevent small birds from squeezing through. Proper tensioning and anchoring to structural beams ensure durability against weather and animal pressure.
• Wire Mesh Screening: Galvanized steel or aluminum mesh is ideal for sealing permanent openings such as vents, cupolas, and gable ends. Secure all edges with corrosion-resistant screws and seal gaps with silicone caulk to eliminate entry points.
• Blocking Roosting Areas: Install angled sheet metal or PVC strips along ledges and beams where birds prefer to perch. These surfaces make it difficult for birds to gain footing, discouraging prolonged stays.

For best results in how to keep birds from nesting in your barn, conduct a full inspection during late fall or winter when bird activity is lower. Identify all potential entry zones and prioritize sealing them before the next nesting season begins.

Effective Deterrent Systems

While exclusion blocks access, deterrents discourage birds from approaching in the first place. These tools work best when integrated into a broader strategy.

Visual Scare Devices

Moving objects that reflect light or simulate predators can startle birds. Examples include:

• Hanging reflective tape or Mylar balloons that flutter in the wind
• Owl decoys with rotating heads (must be moved frequently to remain effective)
• Predator eye balloons featuring large, intimidating patterns

However, birds quickly adapt to static visuals. To maintain effectiveness in how to keep birds away from barn rafters, rotate scare devices every few days and combine them with other methods.

Sonic and Ultrasonic Repellers

Devices that emit distress calls or predator sounds can disrupt bird behavior. Sonic units broadcast audible noises that irritate common pest species without harming them. Ultrasonic models operate above human hearing range but are less effective outdoors due to sound dispersion.

When selecting audio deterrents, choose models designed specifically for agricultural use. Place speakers strategically near roosting sites and program intermittent playback schedules to prevent habituation.

Habitat Modification: Removing Attractions

No control method works long-term if the environment continues to attract birds. Modifying the barn’s surroundings reduces its appeal.

• Feed Management: Store animal feed in sealed containers and clean up spills immediately. Avoid leaving troughs uncovered overnight.
• Water Source Control: Eliminate standing water from leaky pipes or open troughs. Regularly inspect gutters and drainage systems.
• Nest Removal: Remove existing nests during non-breeding months. In many regions, disturbing active nests is regulated by wildlife protection laws, so timing matters.
• Lighting Adjustments: Use motion-sensor lighting to reduce constant illumination that might draw nocturnal species.

By addressing the root causes of infestation, farmers enhance the success rate of any strategy for keeping birds out of storage barns.

Species-Specific Considerations

Different birds require tailored approaches. Common barn invaders include:

Bird Species	Entry Behavior	Preferred Nesting Site	Recommended Control Method
European Starling	Enters through small holes (≥1.5")	Loft areas, wall cavities	Seal cavities; use nest box traps
House Sparrow	Exploits gaps near roofs	Eaves, rafters, machinery	Mesh screening; remove nests early
Pigeon	Lands on open structures	Broad flat surfaces, ledges	Netting; slope barriers
Barn Swallow	Protected under Migratory Bird Treaty Act	Mud nests on beams	Legal exclusion before nesting begins

Note: Barn swallows are federally protected in the U.S., meaning nests cannot be removed once eggs are laid. Plan exclusion efforts in early spring before arrival. Consult local wildlife authorities for guidance on compliance with regulations related to how to legally keep birds out of agricultural barns.

Timing and Seasonal Planning

The most successful bird control programs are seasonal. Late winter is the optimal time to implement exclusion measures, as most birds have migrated or left nesting sites. This allows for thorough inspections and installations without disrupting active nests.

In northern climates, prepare by March; in southern regions, aim for January–February. Delaying until spring increases the risk of violating wildlife protections and reduces available labor during busy farming seasons.

Common Mistakes to Avoid

Even well-intentioned efforts fail when based on misconceptions. Here are frequent errors in how to keep birds out of barn:

• Using ineffective repellents: Sprays claiming to repel birds with taste or smell rarely work on wild populations and wash off easily.
• Trapping without permits: Some states require licenses for trapping certain species. Always verify legal requirements before deployment.
• Ignoring ventilation needs: Sealing too tightly can reduce airflow, increasing humidity and compromising indoor air quality. Balance exclusion with adequate ventilation design.
• Assuming one method suffices: Relying solely on noise or visuals leads to rapid habituation. Integrated pest management yields better outcomes.

Cost Comparison of Bird Control Options

Investing in bird control pays off in reduced maintenance and health risks. Below is an estimated cost breakdown:

Method	Initial Cost (per 1,000 sq ft)	Lifespan	Maintenance Needs
Bird Netting	$800–$1,500	10+ years	Annual inspection
Wire Mesh	$500–$900	15+ years	Minimal
Sonic Repeller	$200–$400	5–7 years	Software updates, repositioning
Visual Deterrents	$50–$150	1–3 years	Frequent rotation

While upfront costs vary, durable exclusion systems offer the best return on investment over time.

Regional and Legal Considerations

Laws governing bird control differ by location. In the United States, the Migratory Bird Treaty Act protects over 1,000 species, including swallows, swifts, and bluebirds. Non-native species like house sparrows and starlings are not protected, allowing more flexible management.

Before beginning any project involving how to keep birds from roosting in barns, check with your state’s Department of Natural Resources or Fish and Wildlife agency. They can clarify which species are protected and what permits may be needed.

FAQs About Keeping Birds Out of Barns

Can I use poison to get rid of barn birds?

No. Avicides are highly restricted and generally not permitted for use in agricultural settings due to risks to non-target animals and humans. Focus on humane, exclusion-based methods instead.

Are bird spikes safe for barns?

Yes, plastic or stainless-steel spikes are effective on ledges and beams. They don’t harm birds but prevent landing and roosting. Ensure they’re UV-resistant for outdoor durability.

How do I know if birds are still getting in after sealing?

Monitor for new droppings, nesting materials, or scratching sounds at dawn. Use trail cameras in dark areas to detect nighttime activity.

Will removing a nest solve the problem?

Only temporarily. Birds will rebuild unless entry points are sealed. Always combine nest removal with exclusion tactics.

Can fans help keep birds away?

Ceiling fans or industrial blowers create air movement that deters some species, particularly in enclosed spaces. While not a standalone solution, they complement other deterrents.

Successfully managing bird intrusion requires understanding avian behavior, applying practical solutions, and respecting ecological and legal boundaries. By adopting a strategic, multi-method approach to how to keep birds out of barn, property owners protect their structures, livestock, and peace of mind for years to come.