Lights out, Colorado! Turn off your lights to help keep millions of migrating birds safe over the next two nights.
An estimated 12 millions birds will be passing through the skies of Colorado and Utah in a massive migration starting on Thursday evening and continuing through Friday evening.
"Colorado and Utah are looking at massive bird migration tonight and tomorrow night!" Audubon Rockies stated in a tweet. "We're talking 12 MILLION birds. Help them migrate safely by reducing light pollution."
More than 2.5 million birds could fly over the state of Colorado Thursday evening alone, according to the migration forecast from Denver Audubon. An estimated 5,800 birds are expected to pass through the city of Colorado Springs, 4,600 birds in Denver, and 1,800 in Fort Collins.
While lights can throw birds off their migration paths and cause collisions with windows and buildings, fatalities are more directly caused by energy wasted flying around and calling out in confusion.
"Do your part to protect them, added Audubon Rockies. "Turn off lights, use blinds, and install motion sensor outdoor lights!"
The National Audubon Society, the International Dark Sky Association, and Denver Audubon have joined forces to promote Lights Out Colorado, a voluntary program aimed at keeping migratory birds safe through reduced light pollution.
Colorado is a bird watchers paradise home to more than 400 native and migratory species.