As birds migrate south, there's an invisible danger: glass

By Nell Greenfieldboyce

Published October 7, 2025 at 5:07 PM EDT

A huge threat to migrating birds is colliding with a building. Now birding groups are banding together with government agencies and others to form one united front to tackle the problem.

Nell Greenfieldboyce

Nell Greenfieldboyce is a NPR science correspondent.

See stories by Nell Greenfieldboyce

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