Bird Friendly Glass

Hundreds of millions of birds die every year in North America due to collisions with building glass facades. The magnitude of the problem is such that an important trend is emerging across North America: to make buildings more bird friendly.

Something Can Be Done

The Problem

Glass causes a major threat to birds due to its transparency and reflectivity. When vegetation is reflected in the glass, birds are not able to distinguish between a real tree and its image. A bird can die when its flight path starts from as little as a few feet from the glass facade. Contrary to popular belief, bird collisions are not just a problem during migratory periods… but all year round!

The Solution

In order to minimize the risk of bird collisions on glass facades certain well researched* “rules of thumb” need to be adhered to – most notably the “2 by 4” rule: two inches or less of horizontal space or four inches or less of vertical space should be left untreated. Research has also confirmed that visual markers are more effective for birds when they are on the outside surface of the glass, giving birds a greater chance to identify the surface from all angles and in varied weather conditions. Many regulations that are put in place today refer to the 2x4 rule and to this first surface treatment.

* The above design parameters are supported by the leading research scientists in the field such as Dr. Daniel Klem.

The Solution

In order to minimize the risk of bird collisions on glass facades certain well researched* “rules of thumb” need to be adhered to – most notably the “2 by 4” rule: two inches or less of horizontal space or four inches or less of vertical space should be left untreated. Research has also confirmed that visual markers are more effective for birds when they are on the outside surface of the glass, giving birds a greater chance to identify the surface from all angles and in varied weather conditions. Many regulations that are put in place today refer to the 2x4 rule and to this first surface treatment.

* The above design parameters are supported by the leading research scientists in the field such as Dr. Daniel Klem.

Bird Friendly Acid-etched Glass

More Information on Bird Deterrence

Dr. Daniel Klem, professor of ornithology and conservation biology at the Muhlenberg College has dedicated his professional life to studying bird deterrence. Below you will find documents authored by Dr. Klem about bird collision with glass facades. This material will provide you with a solid understanding of this deadly phenomenon.

  • A background paper targeting architects that explains various architectural design
    considerations when planning for bird friendly design. Download
  • The current and prospective legislation across North America, as well as the trend of including bird-friendly design in buildings for reasons of sustainable development. Download
  • The purpose of this paper is to provide guidance in creating bird safe glass, and the appropriate test methods needed to evaluate the design of bird friendly glass. Download

AviProtek® T
Transparent Bird Friendly Glass

AviProtek T is an innovative first surface solution that is barely noticeable to the human eye, yet visible to birds.

Communicate with our Experts

Please feel free to get in touch should you have any questions!

AviProtek® T
Transparent Bird Friendly Glass

AviProtek T is an innovative first surface solution that is barely noticeable to the human eye, yet visible to birds.

Communicate with our Experts

Please feel free to get in touch should you have any questions!