Lights Turned Off at the Gateway Arch Every Night to Assist in Bird Migration This Month for … The Gateway Arch in St. Louis turns off the lights at night to facilitate safe passage for 325 bird species on their spring migrations. Read More at Source. Author: Pumilo Share this:TwitterFacebookMoreLinkedInRedditTumblrPinterestPocketTelegramWhatsAppSkypeLike this:Like Loading... Related Tags: BirdNews May 20, 2023 by Pumilo Bird News 0