The invisible killer threatening millions of migrating birds

A dead bird found on the streets of Washington, DC

A dead bird found on the streets of Washington, DC

Every year, hundreds of millions of birds are killed or injured when they fly into windows. Volunteers who document the collisions are now calling for architects and landlords to make their buildings more bird friendly to reduce the number of deaths.

Sometimes birds see plants or empty spaces beyond the windows – sometimes they just see the reflection of the sky or trees, but not the glass itself.

Most tend to cruise at 20-30mph (32-48kph) – if they hit a window at that speed the impact is usually fatal as their beak is jammed back into the brain. Continue reading