how to avoid bird strikes

Birds face innumerable threats in our human built environment and our glass surfaces are one of the biggest. During daylight hours, birds collide with reflective surfaces when they stop to feed or rest, when avoiding a predator or flying from tree to tree. Shiny glass exteriors, internal plants near windows, glass corners, and greenery close to buildings can all be deadly as birds are unable to distinguish reflection from open flyway. For every collision victim found, three more typically go unseen, flying out of sight before falling or being carried away by predators.

Window collisions are one of the leading direct human causes of bird mortality. A 2014 study by the US Fish and Wildlife Service and the Smithsonian Institution estimated that between 365 million to one billion birds are killed annually by building collisions in the U.S.

People ‘see’ glass because we understand buildings. Birds need strong clues on or around glass to warn them that it’s there.

Birds traversing our built environment encounter numerous hazards, ranging from residential windows and glass doors to tall buildings and communication towers. According to research, collisions that occur in both commercial and residential settings, at all hours of the day, may kill up to one billion birds annually in the United States alone. Remarkably, rather than happening in skyscrapers, most of these fatal collisions are taking place in low-rise buildings. The primary causes of these collisions are artificial nighttime lighting and glass.

Light pollution damages birds, but you can help! Make a commitment to turn down the lights to ensure that birds can safely complete their migratory journeys.

See bird-window collision prevention products and solutions, compiled by the Bird-window Collision Working Group (BCWG), a partnership between The Acopian Center for Ornithology, Muhlenberg College, Lehigh Valley Audubon Society, Wyncote Audubon Society, and Audubon Mid-Atlantic, for examples of particular products and an illustration of these approaches.

Buildings’ artificial lights and skyglow can kill migrating birds at night by confusing or diverting them from their path, causing them to circle and land in a vulnerable area. Lights may also attract birds to buildings and other structures. In light of these potential nighttime dangers, follow these easy measures to help avoid crashes. To find out more about ongoing initiatives addressing light and collisions, visit Lights Out.

Because they cannot “see” glass the way humans can, birds may attempt to fly through transparent or invisible glass or strike windows and other surfaces that reflect the surroundings. Birds require clear indicators on or near glass to alert them to its presence. These collisions can happen day or night, so take a look at the methods below for prevention. Visit our Reducing Collisions page for additional resources.

The Acopian Center for Ornithology, Muhlenberg College, Lehigh Valley Audubon Society, Wyncote Audubon Society, and Audubon Mid-Atlantic collaborated to create the Bird-Window Collision Working Group (BCWG), which produced a brochure with recommendations on Making Your Windows Safer for Birds. View a sampling of bird-window collision prevention methods with relative costs and download the brochure.

People ‘see’ glass because we understand buildings. Birds require clear indicators on or near glass to alert them to its presence.

One of the main direct human causes of bird mortality is window collisions. According to a 2014 study conducted by the Smithsonian Institution and the US Fish and Wildlife Service, building collisions in the United States kill between 365 million and one billion birds annually. S.

There are many threats to birds in our built environment, and one of the biggest ones is our glass surfaces. When avoiding a predator, stopping to eat, or flying from tree to tree during the day, birds run into reflective surfaces. Because birds cannot tell the difference between an open flyway and a reflection, reflective surfaces such as glass corners, interior plants near windows, and foliage near buildings can all be fatal to them. Three usually remain unseen, soaring out of sight before falling or being swept away by predators, for every collision victim that is discovered.


Do window screens prevent bird strikes?

External insect screens reduce bird collisions by minimizing window reflections and alerting birds that windows are barriers. Netting prevents injuries to birds if it’s placed inches in front of the window and stretched tight to prevent birds from hitting the glass.

What are the methods of bird avoidance?

Long-stemmed grasses are best suited as vegetation as small birds cannot alight there and birds of prey cannot hunt. Another method used alongside “passive deterrence” by manipulating the ecosystem is monitoring: radar and IR cameras are used to detect larger birds or flocks.

How can we reduce bird collisions?

Daytime collisions are reduced by using glass treatments that allow birds to see glass as a barrier. Glass treatments should be applied up to the third floor, or up to the height of the adjacent vegetation. However, applying treatments to just first story windows or known problem glass can make an important difference.

Which one below is the best way to prevent bird window collision?

Applying regularly spaced markers on glass tells birds that there is a barrier to avoid, and is the best way to prevent collisions. However, there are many small measures that can help to reduce collisions: turn off lights and close curtains or blinds when rooms are not in use. keep houseplants away from windows.