When considering how artificial light affects migratory birds, the color or wavelength of the light is very important. Birds rely on natural light cues to navigate and manage their internal biological clocks. Studies show that blue and white light can be particularly problematic because these wavelengths are highly visible to birds and can interfere with their sense of direction and sleep patterns.
To minimize disruption, it is best to use light with longer wavelengths. Warm colors, such as amber, yellow, or red, are much less disruptive to migratory birds. These warmer tones do not trigger the same level of biological confusion that bright blue or cool white lights do. By choosing warm-colored lighting, you can help keep the environment more natural for traveling birds.
If you are trying to make your area bird-friendly, consider using shielded fixtures that point light downward and choosing warm LED bulbs. Reducing the overall brightness and focusing on warmer spectrums are the most effective ways to protect birds from light pollution during their critical migration periods.
