Lights Out for Wildlife
Lights Out for Wildlife! Your exterior lighting directly affects the health of birds, bugs, and wildlife, and it’s easy to improve it. It’s also healthier for us humans, and stargazers will appreciate your dark sky efforts.
You’re likely already aware of the danger artificial light presents to migrating birds — brightly lights and light-polluted skies cause travelling birds to become confused, lost, and exhausted. Light-dazzled birds often suffer collisions. BirdCast is a good place to find current maps of migrations, which occur both spring and fall – it’s especially important to minimize lights and maintain dark skies when migrants are in your area. Here’s more on why, and how, and when, to switch to Lights Out for Wildlife.
Light pollution also dims our stars and befuddles our bugs, preventing moths from mating and making caterpillars for next season’s banditry of chickadees. The header image is a long-exposure photograph of moths circling light, rather than mating and pollinating and accomplishing other moth tasks.
Fireflies can’t respond to the females dimly glowing in the grass, and their population diminishes. Night light disrupts bats, stymies owl hunts, and negatively affects the health of many mammals (including us humans) in a multitude of ways — the good news is that it’s the easiest pollutant to remediate.
How to Help Keep Skies Dark:
Simple changes can significantly improve your home’s dark sky friendliness:
- Keep exterior lights to a minimum year-round, and off during spring and fall migrations, and when fireflies are active in your yard.
- All exterior lights should be as “warm” (2700 K or lower, i.e. more amber-yellow than white-blue) and low-lumen as possible, and ideally motion-activated.
- Bulbs should be fully shielded, such that light only spills downward, and none upward or horizontally.
- Curtains keep interior lights interior, and warm temperature bulbs are better for human health, too.
- Consider talking with neighbors who may not realize their lighting scheme constitutes trespass, or to your municipality about transitioning to dark-sky approved street and shop lighting.
- Many Audubon and International Dark Sky (IDA) chapters sponsor Lights Out programs during migratory peaks, and both organizations have further information on light pollution mitigation.
This article adapted from one written for the Fall 2025 newsletter of the Seneca Rocks Audubon Society, all back issues of which are available here: https://www.senecarocksaudubon.org/newsletters
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