As many as 200,000 birds are estimated to have migrated across Summit County overnight some days this month. Dark skies will help the birds on their journey.
Colorado mountain residents are darkening the skies to aid millions of migratory birds traveling by starlight summitdaily.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from summitdaily.com Daily Mail and Mail on Sunday newspapers.