Bird-Smart-Glass-LogoEffective Window Solutions

Birds hitting windows is one of the leading causes of bird deaths in the United States. It is estimated that up to 988 million birds are killed each year in the United States when they hit windows, making this threat one of the most costly to bird populations.

Below is a list of products evaluated by American Bird Conservancy that have been shown to reduce collisions on glass. Ratings assume that patterns are applied to the outside surface of glass, or that surface reflections do not obscure the pattern. Included are:

1. Products that have been tunnel tested by ABC, with a tunnel score of 70 or higher. These products are denoted with ABC's ‘Saves Birds' logo.

2. Other products are listed as “Also Recommended” and meet the following criteria:

Note: No window product, including ABC-tested products, can completely eliminate window collisions. Results will vary depending on local bird populations, landscape conditions, and building design.

We at American Bird Conservancy are proud to be the first organization to promote glass collision awareness on a nationwide scale. But we need your help: Please take action today to help solve the problem of birds hitting windows, using one of the options listed below.

The products on this page are designed for both homeowners (directly below) and architects.


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HOMEOWNER PRODUCTS

ABC BirdTape, effective product to stop birds hitting windowsABC BirdTape – Tested

Estimated Cost: $3 per 24″ x 32″ window

Easy to install, long-lasting and affordable, ABC BirdTape is highly effective when installed as recommended. This translucent tape allows light in, but partially obscures views. Lasts at least four years when installed on the exterior surface of a window.
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Acopian BirdSavers, effective product to stop birds hitting windowsAcopian BirdSavers – Tested

Estimated Cost: $24 per 24″ x 32″ window

These “Zen Curtains” are easy to install, long lasting and highly effective. The bird-savers website gives directions to build your own, or order from them from Acopian Bird Savers.

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CollidEscape, effective product to stop birds hitting windowsWhite Collidescape

Estimated Cost: $36 per 24″ x 32″ window

This window film creates a solid appearance from the outside, but allows views from the inside and can reduce glare and cooling costs while protecting birds. Do it yourself or have professionally installed.

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Feather Friendly, effective product to stop birds hitting windowsFeather Friendly® DIY – Tested

Estimated Cost: $10 per 24″ x 32″ window

These adhesive dots applied to the outside of your windows create an effective “frit” pattern. Do-it-yourself or have professionally installed.

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Solyx_Bird Safety Film, effective product to stop birds hitting windowsSolyx® Bird-Safety Film Horizontal -Tested

Estimated Cost: $31 per 24″ x 32″ window

This external film is available in horizontal and vertical stripes. Both have proven highly effective in the field.

This product may require professional installation.

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ARCHITECTURAL PRODUCTS

Most of these products are not available for retail purchase. Contact an architect, glass supplier, or contractor if interested.

Bird-friendly buildings need not cost more than other buildings, if you consider bird-friendly design from the outset. Products listed here have Material Threat Factor Scores below 30 and are suitable for meeting the USGBC LEED™ Pilot Credit 55: Bird Collision Deterrence, and for meeting requirements of local ordinances in San Francisco, Toronto, Highland Park, Oakland, and others, as well as the State of Minnesota's B3 guidelines.

Arnold Glas, Ornilux, effective product to stop birds hitting windowsArnold Glas: Ornilux Low-e Neutral Adv. N33 & Ornilux Low-e Neutral Uno N10 – Tested

Ornilux is the least-visible product currently on the market that provides some significant bird deterrence.

Learn more.

Bendheim-Wall-Systems-3Bendheim Wall Systems' Lambert Channel Glass – Tested

This modular product deters collisions; is up to 60 percent recycled; and features low-emissivity coatings.

Learn more.

Convenience Group Feather Friendly, effective product to stop birds hitting windowsConvenience Group's Feather Friendly Patterns

These external vinyl patterns have proven effective on many buildings in the Toronto area. Users have reported significant reductions in collisions.

Learn more.

 

Evonik, effective product to stop birds hitting windowsEvonik Industries' Acrylite Soundstop BirdGuard – Tested

This acrylic plexiglas has embedded polyamide threads for sliver retention and bird protection. Generally used for noise barriers, it is also suitable for use in handrails in outdoor settings.

Learn more.

GlasPro, effective product to stop birds hitting windowsGlasPro Bird Safe Glass – Tested

This product is ideal for buildings and zoos where building owners want maximum transparency with a maximum deterrent for bird collisions. Inks are rated for a minimum 30-year lifespan in an exterior application, with a lead time of less than 6 weeks. 100 percent made in the USA.

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Guardian Glass, effective product to stop birds hitting windowsGuardian Glass SN68 1/8” “Dark Line” – Tested

This patterned glass is both low-emissivity and solar controlling, enabling architects to meet multiple sustainability goals with a single product.

Learn more.

Solyx Bird Safety Film, effective product to stop birds hitting windowsSolyx® Bird-Safety Film

This external film is available in horizontal and vertical stripes. Both have proven highly effective in the field.

Learn more.

Viracon Birdfriendly Glass, effective product to stop birds hitting windowsViracon – Various Products – Tested

Screen 2256 (20% coverage, 1/8” lines) in V901 Dark Gray – Highly Effective | Screen 2256 (20% coverage, 1/8” lines) in V948 Medium Gray – Highly Effective | Screen 5006 (40% coverage, 1/8” dots) in V175 High Opacity White – Effective

These products have low-emissivity coatings and provide solar control and bird collision deterrence.

Learn more.

Walker Glass Aviprotek, effective product to stop birds hitting windows
Walker Glass' Aviprotek® Bird-Friendly Glass Pattern 214 – Tested

With acid-etched patterns on surface one Walker Glass' Aviprotek® line is an elegant and effective solution. Because the patterns are on surface one, they are more likely to obscure reflections than surface two patterns.

Learn more.


Want to see your product listed here? Contact Dr. Chris Sheppard at csheppard@abcbirds.org


 ABOUT OUR RATINGS

All solutions listed on this page as "tested" have been tested under controlled conditions or evaluated based on collisions numbers tabulated before and after installation (field trials) and have met all criteria below. Data from testing have either been reviewed by ABC scientists or come from ABC's own testing program.

ABC tests glass products and other deterrents by flying birds through a tunnel where they are presented with a clear glass pane in one “lane” and the tested product in another. The number of birds that fly to escape the tunnel towards the clear glass provides a score for avoidance of the deterrent. Light netting is placed in front of the glass to prevent injury to the birds and they are released after one flight.

Visual deterrents or patterns, such as those tested by ABC, can break up reflections and reduce related bird strikes such as those caused by reflected vegetation. However ABC's tunnel testing is not specifically designed to rate products on their ability to reduce bird mortality caused by reflections. It is designed primarily to test how well visible patterns function to deter birds flying towards glass. Field applicability will also vary by installation: Relative effectiveness is governed by variable external factors, such as proximity of vegetation, orientation towards the sun, bird feeders, proximity to other buildings, etc. Realistically, these cannot be measured in statistically reliable tests that would provide broadly applicable results.


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