The City of Greensboro is once again asking residents and businesses to help migrating birds by switching off their lights at night.

The voluntary “Lights Out” program, first launched locally in 2022, is in effect this fall from Sept. 10 through Nov. 30 – the peak season when millions of birds make their way south.

The idea is simple: Between 11 p.m. and 6 a.m., building managers, businesses and homeowners are encouraged to turn off or block non-essential exterior and interior lighting. City officials say taking the step not only conserves energy and reduces light pollution but also helps protect vulnerable bird populations.

According to a 2024 study published in the Public Library of Science, between 365 million and 1 billion birds die in the United States each year due to collisions with buildings. Those collisions affect more than 50 avian families and hundreds of species – and they don’t just happen in downtown high-rises. Homes in rural areas can also pose a threat when lights are left on overnight.

Chief Sustainability Officer Dr. S. Shree Dorestant said that Greensboro’s participation is part of a larger environmental commitment. “Managing how we use lighting is a powerful tool for sustainability — reducing light pollution, protecting birds, and promoting better environmental health,” she said in the plea to help our feathered friends.

The city has already reduced its own non-essential light usage in municipal buildings, citing both sustainability goals in the GSO2040 Comprehensive Plan and preparations for a LEED for Cities recertification in 2026. Greensboro officials have also pointed to the fact that more than 50 U.S. cities – including New York, Boston, Chicago, Atlanta, Baltimore, Washington, Charlotte, Raleigh and Winston-Salem – have adopted similar Lights Out campaigns.

Research in other cities shows these programs make a measurable difference. Bright nighttime lights can confuse migrating birds, causing them to circle until they’re exhausted or they strike windows. Shielding or switching off the lights reduces the number of deadly collisions.

The local program runs twice a year – March 15 to May 31 in the spring and Sept. 10 to Nov. 30 in the fall.

While voluntary, the program depends a lot on community buy-in. Businesses and residents can sign a pledge through the T. Gilbert Pearson Audubon Society to certify their properties as safe passage zones for migrating birds.

For more information or to take the pledge, you can visit www.tgpearsonaudubon.org/lights-out.