Short Wave Migrating Birds Have a Big, Clear Problem
Oct 22, 2025
Nell Greenfieldboyce, NPR's science correspondent, dives into the alarming issue of bird-window collisions during migration season. She highlights that an estimated billion birds face deadly glass hazards each year. Nell shares innovative solutions from research, like patterns that make windows more visible. A case study on Chicago’s McCormick Place shows a 95% reduction in collisions with simple dot patterns. She also discusses local laws promoting bird-friendly buildings and practical tips for homeowners to protect our feathered friends.
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Night Migration And Hidden Toll
- Hundreds of millions of birds migrate at night and are drawn to artificial lights.
- Glass windows present a major hazard, causing an estimated billion U.S. deaths annually.
Stunned Acadian Flycatcher Found
- Volunteer Stephanie Haley found a stunned Acadian flycatcher and took it to wildlife rehab.
- Despite treatment, the bird did not survive, illustrating typical collision outcomes.
Low Buildings Cause Most Collisions
- Most collisions happen low, below tree line, often at 1-3 story buildings and homes.
- A small number of buildings with reflective or funneling glass account for disproportionate deaths.