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ORNILUX-Human's view / Arnold Glas / LicenseCopyright - All Rights Reserved

Insulated glass reduces bird collisions

Inspiring Strategies


Product or process
ORNILUX is an insulated glass sheeting made by Arnold Glas, a Germany-based company, which is designed to reduce the causes of bird collisions. It uses a special ultraviolet (UV)-reflective coating that appears almost transparent to humans, but is clearly visible to birds, because they can see a broader UV spectrum than humans (see photos in gallery for bird's and human's view of the windows).

ORNILUX is now made in the USA by Glasswerks, Inc.

Watch video about use of ORNILUX at the Hellebrunn Zoo.
Challenges solved
More than 250,000 birds per day in Europe die from collisions with glass windows, and estimates in the United States run into the hundreds of millions. Birds either don't see the glass or they see reflections in the glass, such as trees, that make them try to fly through as if it isn't there.

This is a problem world-wide due to the prevalence of glass windows for homes and buildings, and the problem is getting worse. Due to Green Building Practices that focus mostly on energy efficiency, many architects are incorporating larger and larger expanses of glass to let in natural light to save energy. Additionally, the biggest challenge is that people enjoy the aesthetics of glass; this will not change. ORNILUX offers a clear glass solution to allow the aesthetics we enjoy but the protection the birds require.
Differences from existing products
Independent field testing by Dr. Hans-Willy Ley from the Max Planck Institue for Ornithology, tested the effectiveness of ORNILUX glass in avoiding bird collisions.  Results for ORNILUX glass showed that 76% of the birds tested avoided the ORNILUX panel and flew towards the conventional glass panel, indicating that the birds recognized the ORNILUX glass as an obstacle due to its reflective UV coating. These results indicated that ORNILUX can help reduce the number of birds killed by collisions with glass surfaces in buildings and private homes.
The biomimicry story
The inspiration for the use of UV-reflective patterns came from knowledge of how some species of spiders incorporate UV-reflective silk strands to their webs. The reasons for what some scientists refer to as "decorations" include attracting insects and distracting or warning away larger animals, including birds. This is to the spider's advantage, because if a bird were to fly through the web, the spider would temporarily lose its ability to capture prey.

Read the case study and learn more on ORNILUX's website.
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About the Product

Company: Arnold Glas

Product Phase: Available

Product Type: Insulated architectural glass

Patent Name: Bird protection device for a transparent material, glass with a bird protection device and method for producing same

Patent Number: EP2174545 (A1)