A blackbird sits on a branch in front of a blurred building.

Protecting Birds from Collisions

Building collisions are estimated to kill more than a billion birds annually in the U.S
Red-winged Blackbird. Photo: Charlotte Catalano/Audubon Photography Awards

Birds hit buildings at all hours during the day and night. At night migrating birds can be distracted by bright lights in our cities. During the day the problem is reflection or other confusing aspects of glass. 

Our Lights Out program is a national effort to reduce this problem.

The strategy is simple: by convincing building owners and managers to turn off excess lighting during the months migrating birds are flying overhead, we help to provide them safe passage between their nesting and wintering grounds. Our efforts continue to grow, with more than 50 cities and regions involved in Lights Out Programs, encompassing many of the most dangerous metropolitan areas for migratory birds.  By coupling Lights Out activities with bird-safe buildings actions, we are making the skies safer for birds year-round. 

50+
Cities and regions involved in Lights Out programs
1Bn
More than 1 billion birds are killed annually by building collisions in the U.S.
1,000
Birds that collided with a single Chicago building the night of October 4, 2023
Our Impact
Large brown bird perched on a green tree branch with a city building in the background.
Red-tailed Hawk. Photo: Melissa Haylock/Audubon Photography Awards

For more than a century, we’ve preserved bird habitats, conducted scientific research, influenced policymakers to enact commonsense conservation laws, and engaged communities across the hemisphere to protect the natural resources upon which birds—and we—depend. Our hemispheric approach recognizes that the majority of bird species in the Americas migrate annually between Canada, the United States, Latin America, and the Caribbean. Our programs are like the birds—not bound by political boundaries and seamlessly integrated across the Western Hemisphere. We are working to halt, and ultimately reverse, the decline of bird populations across the Americas.

Will you join us?

More about bird collisions
Simple Solutions to Prevent Collisions
Simple Solutions to Prevent Collisions

From communication towers and tall buildings to residential windows and glass doors, birds face a multitude of dangers as they navigate our built environment. Simple solutions can make your community and the skies safer for birds.