Wild Bird Window Collision Prevention

Window collisions kill up to one billion birds annually in North America alone, making glass a leading human-caused source of bird mortality worldwide.

Key Facts

An estimated 600 million to 1 billion birds die from window collisions annually in North America
Birds cannot perceive glass as a barrier and fly toward reflected vegetation or sky
Collisions cause immediate death or delayed death from internal haemorrhage and brain injury
Low-speed collisions cause concussion and leave birds vulnerable to predation
Bird-safe glass with UV-reflective patterns is invisible to humans but visible to birds
Simple DIY solutions including tape strips and decals reduce collision rates by over 50%

Welfare Considerations

Window collisions are a significant source of bird suffering that is almost entirely preventable with low-cost interventions. Birds that survive initial impacts often die later from injuries, or are taken by cats and other predators while stunned. Larger glass areas, particularly on modern commercial buildings, are disproportionately dangerous. Applying external patterns at 5cm horizontal or 10cm vertical spacing to glass surfaces creates a visible barrier to birds without significantly reducing transparency for humans.

What You Can Do

Apply bird-safe tape strips or decals to windows at home and encourage workplaces to do the same
Advocate for bird-safe glass standards in new building regulations in your area
Support organisations researching and promoting bird-safe building design
If you find a stunned bird, place it in a ventilated dark box and contact a wildlife rehabilitator