Light Pollution Threatens Birds
Light pollution from urban areas is known to be disruptive to birds during their spring and fall migrations. Strong artificial lights attract birds, causing disorientation and impairing their ability to navigate. As more migratory birds are drawn into cities, they face higher risks of window collisions and increased interactions with urban wildlife, including domestic cats. Additionally, the depletion of critical resources such as food and water in urban stopover areas further threatens their survival.
The Greater Vancouver Area is a major source of light pollution along the western coast of North America. As the region continues to see more urbanization and densification, with an estimated 1.4 million new residents expected in Metro Vancouver over the next 20 years, the negative impact of light pollution on migratory bird populations is expected to intensify.
Protect Birds
Both residents and property managers can help reduce light pollution while keeping spaces safe and well-lit. Simple steps include dimming or turning off outdoor lights when not needed, using window covers at night to reduce glare, choosing warmer-colored bulbs, and installing shielded fixtures that direct light downward. You can also install shielded full-cut light fixtures that shine light downward or utilize lighting systems with motion sensors or automated schedules. These actions can help reduce the effects of light pollution on migratory birds, reduce energy usage and save money. BC Hydro also offers several incentives to help make upgrades easier.
Efforts in the region are already underway to decrease the amount of light pollution. Resources like the Bird Friendly Design Guidelines (2017) and Green Bylaw Toolkit (2021) help guide local land practitioners in reducing light pollution caused by future developments. Researchers at UBC are also studying its impact on wildlife, especially migratory birds. Still, greater awareness and action are needed to help bring changes and reduce our regional impact.
If you’re interested in learning more about light pollution, how it affects migratory birds and actions you can take to help, check out the links below for more information.
