Visionary modernist architect Le Corbusier once predicted that glass would symbolize the spirit of a new age by not only redefining modern architecture but also reconnecting humanity with nature. He eloquently stated: 

“Glass will be a characteristic feature of building in the new machine age because it is the most direct means by which we can find one of the essential conditions for life: sun and light.” 

Glass architecture has indeed become synonymous with beauty and innovation. It allows natural light to flood into our spaces, reduces energy consumption, and offers a visual connection to the outside world.  

As much as it benefits humans, however, it unintentionally harms the creatures we share our environment with—birds.

The glass paradox 

While glass enables humans to feel closer to nature, it poses a terrible threat to birds worldwide. Each year, billions of birds die after colliding with glass structures. Bird-window collisions have become one of the leading causes of bird mortality, contributing to the decline of many species. 

Here’s why glass is such a hazard for birds:

• Reflective glass: Mirrored glass reflects trees, vegetation, and sky, tricking birds into thinking they’re flying into open spaces.                                                                                                                                                                                                                                    
• Fly-through glass: Non-mirrored/transparent glass often creates a “fly-through effect” appearing like an open passage. Birds may attempt to access indoor plants, water, or other objects seen through the glass.                                                                                                                                                                                                         
• Urban expansion: Rapid urban development has outpaced birds’ ability to adapt, leaving them vulnerable in cities where glass surfaces dominate.                                                                                                                                                                          
• Artificial light at night: Migratory birds are attracted to artificial light at night (ALAN) and get disoriented. Tired and confused, they fly about and often hit windows and other glass surfaces.  

According to the American Bird Conservancy, bird collisions not only claim lives but also significantly threaten species already struggling due to habitat loss and climate change. 

For homeowners and building managers alike, the question arises: How to keep birds from hitting windows?  

Is there a sustainable path that does not sacrifice glass? 

The solution is not to abandon glass—it remains an essential material for sustainable architecture and human well-being. Instead, we need to focus on bird-strike prevention by deploying collision deterrent strategies. 

Feather Friendly has been at the forefront of this movement since 2006, offering effective, aesthetically pleasing bird-safe solutions for bird-friendly glass design. All of our solutions perfectly adhere to the Canadian Standards Association’s (CSA) Bird Friendly Building Design Standard, which has been established collaboratively by architects, ornithologists, conservationists, and glass manufacturers. 

This outlines proven methods for reducing bird-window collisions, such as: 

• Using visual markers on glass to alert birds to its presence. 

• Designing buildings with bird-safe materials and patterns that are minimally invasive to aesthetics. 

• Reducing the use of reflective surfaces in high-risk areas. 

For more details, Feather Friendly® provides free access to the CSA Bird Friendly Building Design Standard. 

Feather Friendly is leading the charge in preventing bird collisions 

Research shows that patterned markers on glass are the most effective way to stop birds from hitting glass.

Feather Friendly offers markers that are: 

• Highly effective: Proven 95% efficacy in independent studies. 

• Tested and approved: By leading conservation organizations such as American Bird Conservancy, and ornithologists such as Dr Daniel Klem, Jr. 

• Minimally covers glass: Covers only 6-8% of the glass surface, with no thermal load. 

• Aesthetically pleasing: Ensures unobstructed views both inside and out. 

• Durable and reliable: Tested in various climates and environments for lasting performance. 

With solutions for both residential and commercial buildings, we are trusted worldwide for making urban landscapes bird-safe without compromising architectural beauty. 

Join the movement to protect birds 

Every year, bird-glass collisions reduce global bird populations, yet this crisis is preventable with the use of the right solution. By deploying Feather Friendly, you not only get a product that is proven to work for years, but also our expertise, which helps you choose the right solution for your property.  

Whether you’re wondering how to keep birds from hitting windows at home or looking for scalable solutions for commercial projects, we’re here to help. 

Glass and birds can coexist 

The beauty of glass doesn’t have to come at the cost of bird lives. With innovative solutions like those offered by Feather Friendly, we can harmonize modern design with ecological responsibility.  

Get in touch with us and find out why we are leading the way in creating safer, more sustainable cities—for both humans and birds.