Lights Out Philly, established by the Audubon Society and other partners, aims to make it safer for thousands of birds that migrate through the city. From April 1 to May 31 and August 15 to November 15, property owners and tenants will voluntarily dim their lights between midnight and 6 a.m. so that birds don't crash into buildings. "We get to do our part in the community to preserve the bird population and get to conserve energy at the same time, saving money and our assets." Kristine Kiphorn, executive director of the Building Owners and Managers Association of Philadelphia, told The Associated Press.

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