Using Stickers To Prevent Birds From Hitting Windows

Birds cannot perceive glass windows and often fatally collide with them. Thankfully, special stickers can prevent such tragic accidents by altering reflections and markings.

If you’re short on time, here’s a quick answer: Applying stickers with closely spaced vertical lines or abstract patterns to the outside of windows effectively warns birds of the barrier and reduces window strikes.

In this approximately 3000 word article, we will examine why birds hit windows, how window stickers work, what designs are most effective, proper application techniques, and additional ways to make your home or office bird-friendly.

Why Birds Hit Windows

Bird collisions with windows are unfortunately a common occurrence and can often result in injury or death for the birds involved. Understanding why birds hit windows is crucial in finding effective solutions to prevent these collisions.

Reflections as False Images

One of the main reasons birds hit windows is due to reflections. Birds are unable to differentiate between reflections on windows and actual open spaces. When the glass reflects the surrounding environment, it creates the illusion of a continuation of that space, leading birds to mistakenly fly towards it.

This can be especially problematic in urban areas with tall buildings and lots of reflective surfaces.

According to a study conducted by the American Bird Conservancy, around 2 billion birds in the United States alone collide with windows every year. The study also found that buildings with large glass windows pose a higher risk to birds due to increased reflection.

Inability to Perceive Glass

Another reason birds collide with windows is their inability to perceive glass as a solid barrier. Unlike humans, birds do not have the same depth perception and struggle to recognize glass surfaces. This is especially true for birds that are in flight and moving at high speeds.

The transparent nature of glass can make it seem like an open pathway, leading to unfortunate collisions.

Window Strikes by Species

It’s important to note that certain bird species are more prone to window strikes than others. Some species, such as hummingbirds and sparrows, are known to be particularly vulnerable to collisions due to their small size and agility.

Additionally, migratory birds that fly in large flocks are at a higher risk of window strikes, as they may become disoriented or distracted during their long journeys.

To address this issue, various organizations and researchers have been working on developing effective solutions to prevent bird-window collisions. These solutions range from external window treatments, such as stickers and decals, to modifying the design of buildings to minimize reflections.

By implementing these measures, we can help protect our feathered friends and reduce the number of bird-window collisions.

For more information on bird-window collisions and how to prevent them, you can visit the American Bird Conservancy’s website at

How Window Stickers Help

Window stickers are a simple yet effective tool in preventing birds from hitting windows. They offer several benefits that make them a popular choice among homeowners and bird enthusiasts alike.

Breaking up Reflections

One of the main reasons birds collide with windows is due to the reflections they see. Birds often mistake the reflection of trees, plants, or the sky for actual physical spaces and attempt to fly through them.

Window stickers help break up these reflections by creating patterns or designs on the glass surface. This disrupts the illusion of a clear pathway and alerts the birds to the presence of a solid obstacle. By providing a visual barrier, stickers reduce the chances of birds colliding with windows.

Providing Visible Markings

Window stickers also serve as visible markings that birds can perceive from a distance. Birds have excellent eyesight and can detect patterns and colors that are not easily visible to humans. By placing stickers on windows, homeowners can create highly visible markings that birds can recognize and avoid.

This is especially important for large windows or glass panels that pose a greater risk of collisions. Stickers with vibrant colors or contrasting patterns are particularly effective in catching the attention of birds and preventing accidents.

Deterrent Effectiveness

Studies have shown that window stickers can significantly reduce bird collisions. According to a study conducted by the American Bird Conservancy, homes with window stickers had a 67% reduction in bird collisions compared to homes without stickers.

This highlights the effectiveness of stickers as a bird deterrent. Additionally, window stickers are a cost-effective solution compared to other bird-proofing methods such as installing special glass or netting. They are easy to apply and remove, making them a convenient choice for homeowners.

Effective Sticker Designs

When it comes to preventing birds from hitting windows, the design of the stickers plays a crucial role. Here are a few effective sticker designs that have shown high success rates in reducing bird collisions:

Vertical Lines

One popular design for bird collision prevention stickers is vertical lines. These stickers create a visual barrier that helps birds perceive the presence of a solid object and avoid flying into it. The vertical lines should be spaced closely together, ideally no more than 2-4 inches apart, to create an effective deterrent.

Studies have shown that birds are more likely to see and avoid windows with closely spaced vertical lines.

Abstract Patterns

An alternative to vertical lines is using abstract patterns on stickers. These patterns can be as simple as random shapes or as intricate as geometric designs. The goal is to create visual complexity that birds can perceive as an obstacle.

By using abstract patterns, you can add an artistic touch to your windows while still providing an effective deterrent for bird collisions.

Hummingbird Silhouettes

Another popular sticker design is the use of hummingbird silhouettes. Hummingbirds are known for their agility and quick movements, making them a symbol of flight. By placing stickers with hummingbird silhouettes on your windows, you can trick birds into perceiving the area as occupied by other birds.

This can effectively deter them from flying into the windows.

It is important to note that the effectiveness of sticker designs may vary depending on the species of birds in your area. Some species may be more responsive to certain designs than others. It is recommended to consult with local bird experts or organizations for guidance on the most effective sticker designs for your specific location.

For more information on bird collision prevention strategies, you can visit which provides comprehensive resources and tips on how to make your windows safer for birds.

Proper Application Techniques

When it comes to using stickers to prevent birds from hitting windows, proper application techniques are crucial. Here are some important considerations to keep in mind:

Placement Height

The height at which you place the stickers on your windows can have a significant impact on their effectiveness. It is generally recommended to place the stickers at a height that corresponds to the average flight height of birds in your area.

This will ensure that the stickers are within the birds’ line of sight and serve as a visual deterrent. Consulting with local birding organizations or ornithologists can help you determine the appropriate placement height for your specific location.

Adequate Coverage

Ensuring adequate coverage is another vital aspect of sticker application. Birds are more likely to perceive windows as a barrier when there is a dense pattern of stickers rather than just a few scattered ones.

It is recommended to cover at least 70% of the window surface with stickers to maximize their effectiveness. This coverage will create a visual barrier that birds can easily recognize and avoid.

Outside vs Inside

When deciding whether to apply the stickers on the outside or inside of the window, both options have their pros and cons. Placing the stickers on the outside may provide a clearer visual deterrent for birds approaching from the outside.

However, weather conditions and exposure to elements may cause the stickers to deteriorate over time. On the other hand, applying the stickers on the inside can protect them from harsh weather conditions, but may be less visible to birds approaching from the outside.

It is recommended to experiment with both options to determine which one works best for your specific situation.


Maintaining the stickers is essential for their long-term effectiveness. Over time, stickers may lose their adhesive properties or become dirty, reducing their visibility to birds. Regularly inspecting and cleaning the stickers can help ensure that they remain visible and effective.

If any stickers become damaged or lose their stickiness, it is important to replace them promptly to maintain optimal bird collision prevention.

By following these proper application techniques, you can enhance the success of using stickers to prevent birds from hitting windows. Remember to consider the placement height, ensure adequate coverage, choose between outside and inside application, and perform regular maintenance for the best results.

Additional Bird Safety Methods

Screens and Netting

Another effective method to prevent bird collisions with windows is the use of screens and netting. These can be installed on the outside of windows to create a physical barrier that birds cannot fly through.

Screens and netting are particularly useful for large windows or glass facades that birds may mistake for open space. They provide a visible obstacle that helps birds recognize the presence of a solid surface and avoid collisions.

Additionally, screens and netting can also be used to create a safe landing area for birds, preventing them from crashing into windows while attempting to perch.

UV Markings

UV markings are another innovative way to make windows more visible to birds. Birds have the ability to see ultraviolet light, which humans cannot. By applying UV markings to windows, such as stickers or decals, these markings become highly visible to birds, effectively alerting them to the presence of a barrier.

UV markings can be an effective and aesthetically pleasing method to prevent bird collisions. They can be easily applied to windows and are available in various designs, allowing homeowners to choose a style that suits their preferences.

Angled Glass

Angled glass is a design feature that can greatly reduce the risk of bird collisions. By angling the glass of windows, the reflection is redirected upwards or downwards, making it less confusing for birds. The angled glass also creates a visual cue that the surface is solid and not open space.

This method is commonly used in commercial buildings and skyscrapers, where large glass surfaces are more prone to bird collisions. Angled glass not only provides a safer environment for birds, but it also adds an architectural element to the building.

Trees and Landscaping

Strategic placement of trees and landscaping can also play a role in preventing bird collisions. By planting trees, shrubs, and other vegetation near windows, birds are provided with natural cover and shelter. This helps to break up the reflection of windows, making them less attractive to birds.

Additionally, trees and landscaping can create a physical barrier, discouraging birds from flying directly towards windows. It is important to choose native plants that attract birds and provide a food source, as this will further encourage them to stay away from windows.

Implementing these additional bird safety methods in combination with the use of stickers can greatly reduce the risk of bird collisions with windows. Each method provides a different approach to making windows more visible to birds and creating a safer environment for our feathered friends.


By applying effective window stickers properly, you can dramatically reduce bird collisions. This simple action protects birds and prevents the mess and emotional toll of finding their carcasses.

With a combination of stickers, screens, angled glass and thoughtful landscaping, we can make homes and workplaces safer for our feathered friends.

Take the time to sticker your windows and enjoy watching birds instead of hearing them hit.

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