Birds may take migration pit stops to boost their immune systems – The Washington Post Researchers once thought that when birds took breaks along long migration routes, they were stopping to build up their fat reserves. Read More at Source. Author: Pumilo Share this:TwitterFacebookMoreLinkedInRedditTumblrPinterestPocketTelegramWhatsAppSkypeLike this:Like Loading... Related Tags: BirdNews March 18, 2023 by Pumilo Bird News 0