NPR

Big Cities, Bright Lights And Up To 1 Billion Bird Collisions

When birds migrate, they can become attracted to and disoriented by artificial lights. The result: they end up colliding with skyscrapers and other buildings.
One World Trade Center (WTC) stands in the lower Manhattan skyline as birds fly over the Hudson River in Hoboken, New Jersey, on Feb. 8, 2019.

Up to 1 billion birds die from building collisions each year in the United States, and according to a new study, bright lights in big cities are making the problem worse.

The study, published this month in the journal , examined two-decades of satellite data and weather radar technology to determine which cities are the most dangerous for birds.

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