act as benchmarks for environmental health,.In conjunction with primary measures to make buildings and homes, especially their windows, more bird friendly ( check out this comprehensive resource for preventing window collisions) during daylight hours, lights out campaigns offer a critically important opportunity to reduce and to eliminate an enormous contributing source of nocturnal and diurnal hazards. The BirdCast team joins a growing international Lights Out efforts already underway, including in over 30 cities in North America, in proposing and implementing one solution that is as simple as flipping a switch. An estimated 365 – 988 million birds die in collisions with buildings annually, including a number of species of high conservation concern. Light attracts and disorients migrating birds, confusing and exhausting them as well as making them vulnerable to collisions with buildings, not to mention other urban threats like cats and toxins. Light pollution harms birds, but you can help! This mass movement of birds must contend with a dramatically increasing but still largely unrecognized threat: light pollution. Every spring and fall, billions of birds migrate through the US, mostly under the cover of darkness.
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