New study finds birds of prey use unique air sac to soar to great distances Unlike the lungs of mammals, bird lungs do more than just breathe. An air-filled sac within the birds‘ lungs is thought to increase the force the … Read More at Source. Author: Pumilo Share this:TwitterFacebookMoreLinkedInRedditTumblrPinterestPocketTelegramWhatsAppLike this:Like Loading... Related Tags: BirdNews June 16, 2024 by Pumilo Bird News 0