The Seriousness of Window Collisions: Protecting Birds and What You Can Do
- 8 hours ago
- 4 min read
Every year, more than one billion birds die from collisions with windows across the United States and Canada. These accidents are not just unfortunate incidents but a significant cause of bird mortality that often goes unnoticed. According to the U.S. Fish and Wildlife Service (USFWS) and the American Bird Conservancy, window collisions kill more than one billion birds annually in North America alone. This staggering number highlights a serious threat to bird populations and biodiversity.
Many people assume that birds flying into windows either fly off unharmed or die instantly. The reality is more complex and troubling. Birds that appear fine after a collision can suffer delayed injuries such as brain swelling, fractures, or become vulnerable to predators. Understanding the seriousness of window collisions and learning how to prevent them can help protect these vital members of our ecosystems.
Why Window Collisions Are Deadly for Birds
Birds do not recognize glass as a barrier. They see reflections of the sky, trees, or open space and fly directly into windows at full speed. The impact can cause:
Head trauma including swelling and internal bleeding
Fractures in wings and other bones
Internal injuries that are not immediately visible
Disorientation making birds easy prey for predators
Even birds that fly away after hitting a window may die hours or days later from these hidden injuries. This delayed mortality makes it difficult to track the true impact of window collisions on bird populations.
The Scale of the Problem
The USFWS, American Bird Conservancy and USGS estimate that window collisions kill more than one billion birds every year in the U.S. and Canada.
These deaths contribute to the decline of bird populations already threatened by habitat loss, climate change, and other human activities. Window collisions are one of the top human-related causes of bird mortality.
How to Prevent Window Collisions
Individuals, homeowners, and business owners can take practical steps to reduce bird collisions with windows. Here are some effective strategies:
1. Make Windows Visible to Birds
Birds collide with windows because they see reflections or clear glass as open space. Making windows more visible can prevent these accidents.
Apply aesthetic window films with patterns visible to birds but subtle to humans. Companies like Feather Friendly offer such films that blend with building design.
Use decals, stickers, or tape arranged in patterns no more than 2 to 4 inches apart horizontally or vertically.
Install external screens or netting to create a physical barrier.
Links to products are provided below.
2. Change Lighting and Window Placement
Reduce nighttime lighting, especially during migration seasons, to avoid attracting birds.
Use blinds or curtains to break up reflections.
Position bird feeders and baths either very close (within 3 feet) or far away (more than 30 feet) from windows to reduce high-speed collisions.
3. Use Window Treatments Designed for Bird Safety
Feather Friendly and similar companies provide specialized window films that reduce reflections and increase visibility for birds.
These films are durable, easy to install, and maintain the aesthetic appeal of windows.
Links to products are provided below.
Links to products to help prevent window collisions:
What to Do If You Find a Bird After a Collision
If you find a bird that has hit a window, your actions can make a difference in its survival.
Immediate Steps
Approach the bird calmly and gently.
Place it in a small ventilated box lined with a soft cloth.
Keep the box in a quiet, dark place to reduce stress.
Avoid Giving Food or Water
Do not attempt to feed or give water to the bird unless instructed by a wildlife rehabilitator.
Seek Professional Help Quickly!
Birds with internal injuries need skilled care. Transport the bird as soon as possible to a permitted avian rehabilitator. These professionals have the training and resources to provide proper treatment.
Why Professional Care Matters
Birds with head trauma or fractures require medical attention that cannot be provided at home. Delays in treatment reduce chances of recovery. Licensed rehabilitators can:
Diagnose hidden injuries
Provide pain relief and supportive care
Monitor recovery and release birds back into the wild when ready
Stay informed about our latest rehabilitation efforts and get behind-the-scenes updates on our work with avian wildlife.
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