Save a Bird: Simple Ways to Make Your Windows Safer
Help Birds Avoid Crashing into Windows
Approximately one billion birds die annually in the U.S. from colliding with glass, primarily due to the reflections of foliage and sky in windows below four stories. As natural habitats shrink and urban development expands, this tragic number is steadily climbing (Loss et al., 2014; Kornreich et al., 2024).
Why do birds fly into windows?
Glass poses an invisible and deceptive threat to birds. Unlike humans, birds don't perceive glass as a solid barrier. Instead, they're often lured by reflections that mimic their natural habitat, such as trees and open sky. Birds can also strike windows when drawn to nearby landscaping or interior lights. Tragically, many birds that initially survive these collisions succumb to their injuries later.
The good news is that these collisions are preventable! There are numerous ways to make our homes and buildings safer for birds, many of which offer the added benefits of improved aesthetics and reduced energy consumption and costs.
How can you help?
Make Your Windows Bird-Safe by Adding Visual Cues.
Applying patterns to the outside of your windows helps birds recognize the glass. For optimal protection, especially for small birds like hummingbirds, these patterns should be at least ¼-inch in diameter and spaced no more than 2 inches apart (ideally in a 2" x 2" grid). Using medium to light colors for these patterns is best, as dark colors can be hard for birds to see against dark reflections.
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Tempera Paint: Non-toxic tempera paint can be used to create patterns or artwork directly on exterior glass, following the 2" x 2" spacing. This solution can last for years and is easily removed with vinegar and water – a fun project for all ages!
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Screens: External insect screens reduce reflections and signal a barrier to birds.
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Tapes, Decals, and External Films: These products offer various aesthetic options and come in many colors, tints, and patterns to suit your style.
For more information on bird-window collisions and how to make your home or business bird-safe, explore the U.S. Fish and Wildlife Service's Bird Friendly Home Tool Kit.
