Wildlife

Wild Nesting Bird Window Strikes

Window strikes cause significant bird mortality and welfare harm across UK gardens and commercial buildings, with effective mitigation widely available.

Key Facts

An estimated 100 million birds die annually from window strikes in the UK and USA combined
Reflective glass and clear passage between windows create the greatest collision risk
Window strike prevention products including visual markings reduce strikes by over 90 percent
Birds struck by windows suffer traumatic brain injury and may die hours to days after apparent recovery
Garden feeders and water sources placed near large windows increase local strike risk

Welfare Considerations

Birds killed or injured by window strikes suffer traumatic injury that may cause immediate death or prolonged dying after apparent recovery. The scale of this mortality represents one of the largest preventable sources of human-caused bird welfare harm.

What You Can Do

Apply window strike prevention products such as external markings to high-risk windows
Position bird feeders very close to windows (less than 1 meter) or far away (over 10 meters)
Support building regulations that require bird-safe glass specifications for new construction