Bird Migration and Human Infrastructure Threats

Billions of migratory birds die each year from collisions with human infrastructure including windows, power lines, and communication towers. Understanding and mitigating these threats reduces enormous preventable mortality.

Key Facts

Window strikes kill an estimated 600 million to 1 billion birds annually in the US
Communication towers kill up to 6.8 million birds per year in the US through collision and lighting attraction
Power line electrocution kills millions of large birds including raptors and storks globally each year
Cats kill approximately 1.3 to 4 billion birds annually in the US, primarily migratory songbirds
Simple window treatments including UV-reflective patterns dramatically reduce collision rates

Welfare Considerations

Bird collision mortality from human infrastructure is one of the largest sources of preventable mortality in the animal kingdom. The scale is staggering — over a billion birds per year in the US alone from windows and towers — and solutions exist for most mortality sources. Window film, communication tower lighting reform, power line insulation, and cat management are all evidence-supported interventions that can be implemented at individual, institutional, and policy levels.

What You Can Do

Apply bird-safe window film or tape patterns to large glass windows at home and work
Advocate for bird-safe glazing standards in building codes for new construction
Support communication tower lighting reform that uses white strobes rather than constant red lights
Donate to organizations advocating for migratory bird infrastructure protection
Keep pet cats indoors or provide cat-safe outdoor enclosures