Residents are being urged to turn off non-essential lights between 11 p.m. and 6 a.m. this weekend as more than 12 million birds migrate over Washington state. This annual event is part of a larger migration where billions of birds cross the U.S., mainly at night.

Researchers, using radar technology, have predicted the migration will occur this weekend. The lighter the radar color, the more birds are expected, indicating a significant movement over the eastern part of the country.

Artificial light has been identified as one of the biggest threats to migrating birds. It can distract and disorient them, impacting their journey. Researchers are asking people in the area to help by dimming or turning off lights during the peak migration hours.

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