This is the best summary I could come up with:

Volunteers are still recovering bird carcasses within 1.5 miles of McCormick Place, the largest convention center in North America, which is largely covered with glass.

“In fact, we often see birds collide with glass and they continue flying some distance away, seriously injured in ways that ultimately they won’t survive past a few hours,” Samuels added.

Weather conditions like opposing wind, rain and fog can make it difficult for birds to orientate themselves, in addition to light pollution from cities that can draw them in and trap them among deadly structures.

A 2021 study done in McCormick Place, the same site of Thursday’s bird deaths, found that shutting off half the lights in large buildings can reduce collisions by six to 11 times.

Having window glass with visual markers like dots or patterns can break up the appearance of reflection and let birds recognize whether there is a safe passage for them to fly through.

“We have a lot of existing buildings that are killing birds, not just new construction,” said Samuels, adding that investments in retrofits, creating tax credits for such environmental initiatives and making windows more bird-friendly can be an economical way to solve this.

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