Millions of birds collide with glass windows, doors, and facades every year, with many of these accidents resulting in death. The number of birds affected by this problem is anticipated to rise in the future years as glass becomes a larger part of the exterior building structure. Architects are seeking glass solutions that are safer and assist to decrease the danger of bird collisions while still offering the aesthetic and performance qualities that their buildings demand as building standards become more strict across the world. Then, the bird-friendly glass comes in this scenario.

The Variety of Reasons For Birds Crashing into a Glass

The transparency and reflection of glass are the two most prevalent reasons for birds colliding with it.


Birds can’t assume the difference between reflections and the actual thing. When it’s light outside and dark inside, even low-reflective glass might function as a mirror. The reflections, when combined with particular façade designs, can produce regions that are visually perplexing to birds.


Birds do not perceive the glass as a barrier when there is a straight line of sight from one window to another (e.g. walkways, corners, bus stops, or transparent wind/sound barriers), and attempt to fly through, resulting in a crash. Birds may also find indoor plants to be appealing.


The design of a building, as well as its location, can have a major impact on the risk of collision and the maximum efficacy of accidents. The design of the building, its location, and the landscaping (particularly the expected height of the tree once starting to develop) all have a significant influence on the collision risk.


Birds navigate for their migrations during the night sky and ambient light levels. This results in nocturnal crashes because illumination inside buildings, particularly those with potential habitat for birds, draws them. Artificial lights, especially those that move upward, can attract and trap birds in their haze, causing them to become exhausted and perish.

Why Should You Choose High-Quality Bird-Friendly Glass?

Architects may now pick from a variety of bird-friendly glass choices with varying quality and pricing points. Bird-Friendly Glass The most successful design solutions follow the 2” by 4” guideline, according to field research and tunnel testing. On a horizontal axis, markers must be no more than two inches away, and on a vertical axis, markers must be no more than four inches apart. These measurements are shorter from top to bottom and narrower than the wingspans of most flying birds. Birds interpret the markings as tightly spaced barriers, even if they don’t see the glass itself. As a result, the birds are less likely to attempt to fly through the glass.

The most effective Bird-Friendly Glass

The most effective markings, according to extensive research, are put on the outside surface of the external part of any building. The importance of this surface is that it is the only one that is always visible, regardless of lighting circumstances.

Depending on the lighting, the glass might look clear, shiny, or very black. As a result, marks put on interior surfaces are less apparent under certain lighting situations and are therefore invisible to birds. Many bird-friendly solutions, however, fall into this category. Acid-etched glass, on the other hand, does not have this problem.

Unlike ceramic frit markers, acid etching leaves a permanent imprint on the glass surface and does not create additional layers that fade or wear off over time. Acid-etched markers will not deteriorate or lose their impact when exposed to the environment since they are embedded in the glass. Acid etching is performed at the factory to glass sheets. A considerable portion of the glass sheet might be wasted if window design planning is not done properly. The objective is to get as many usable slices out of each sheet as possible. Architects may remain on budget and avoid bird collisions by following these design principles. Then, for even more efficiency, choose a multi-directional design for your bird-friendly windows, which allows your fabricator to spin the glass to fit more cuts into each sheet.

Morn Glass is a special supplier of bird-friendly glasses. We’ll assist you in choosing the correct glass for your needs and double-check the whole installation procedure with a team of trained experts. If you need any support at any time, you can call us.


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