Wild Bird Raptor Strike Windows Welfare

Raptors and other birds of prey are vulnerable to window strikes due to high-speed flight. Prevention through window treatment reduces preventable mortality at scale.

Key Facts

Birds of prey including sparrowhawks, falcons, and owls are regularly killed by window strikes
High-speed pursuit flights bring raptors into contact with windows at velocities that cause fatal impact
Garden bird feeders positioned near windows increase raptor strike risk by concentrating prey near glass
UV-patterned glass visible to birds but transparent to humans reduces strike rates significantly
BTO Garden Wildlife Health tracks window strike mortality contributing to population data

Welfare Considerations

Raptor window strikes cause acute welfare harm through traumatic brain injury and death in birds that were pursuing prey in natural flight. Prevention through window treatment at high-risk locations - particularly gardens with bird feeders near windows - provides welfare protection for species that are already under population pressure from multiple threats.

What You Can Do

Apply UV-pattern film to windows near bird feeders to reduce raptor strike risk
Position bird feeders either close (under 1 metre) or far (over 5 metres) from windows to reduce strike risk
Report raptor window strikes to BTO Garden Wildlife Health reporting scheme
Share window strike prevention guidance with wildlife-interested neighbors and community members