Do Denver’s lit buildings kill birds? Nobody knows, so volunteers have begun to count.

A recent study showed bird populations in the U.S. and Canada have dropped by almost 30 percent in the last 50 years. One reason may be collisions with buildings, but it’s not yet clear how big a problem that is along the Front Range.
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Illuminated buildings downtown at dawn, Sept. 18, 2019. (Kevin J. Beaty/Denverite)

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