Urban Wildlife

Captive Bird Welfare and Window Strike Prevention

Window collisions kill hundreds of millions of birds annually in North America, making prevention a major welfare issue.

Key Facts

Up to 1 billion birds die from window collisions annually in North America alone
Glass appearing reflective or transparent is the primary hazard
Ultraviolet-reflective window films visible to birds reduce collisions by 90%
Low window placement is particularly dangerous for ground-feeding species

Welfare Considerations

Birds striking windows experience traumatic brain injury, skull fractures, and internal hemorrhage. Many that appear stunned after striking die from internal injuries hours later. Building-scale interventions including patterned glass and external screens prevent collisions comprehensively. Individual householders can significantly reduce mortality with low-cost applications to existing windows.

What You Can Do

Apply UV-reflective film or patterned tape to reflective windows
Keep bird feeders within 1 meter of windows or more than 10 meters away
Use external window screens or net barriers on high-risk windows
Advocate for bird-safe building design standards in new construction