Wild Bird Window Collision Prevention

Window collisions kill hundreds of millions of birds annually in North America alone, making them one of the most significant sources of human-caused bird mortality.

Key Facts

Estimates suggest 600 million to 1 billion birds die from window collisions in the US annually
Birds cannot perceive glass as a solid barrier and fly into reflections of sky and vegetation
Collisions are most common at home windows, not tall buildings
Simple deterrents like window films and external screens reduce collisions by 90%+
The American Bird Conservancy has certified bird-friendly glass products
Dawn and dusk are peak collision times when birds are most active near vegetation

Welfare Considerations

Birds that survive initial window impacts often die hours to days later from internal injuries, brain trauma, and stress. Those that recover may suffer broken beaks, wings, or skulls. The suffering of hundreds of millions of birds annually from this preventable cause represents an enormous welfare problem that is largely absent from public awareness. Given the simple and inexpensive solutions available, window collisions represent a highly tractable opportunity for individuals to prevent enormous amounts of animal suffering.

What You Can Do

Apply bird-safe window films or decals to large glass surfaces at your home
Move bird feeders within 1 meter or beyond 10 meters of windows to reduce collision risk
Keep curtains or blinds partially closed to reduce reflection and transparency
Report window collision locations to the Fatal Light Awareness Program database
Advocate for bird-friendly glass requirements in building codes