They also sometimes dive underwater to escape danger. Despite being heavy birds, geese can fly over 30 miles per hour. They use forceful wing beats instead of gliding in the air like eagles.

“He released a shimmering trail of tiny microbubbles from his plumage, coating himself with a lubricating layer of air to cut drag and maximize speed,” Crosby said. “Perhaps most enchantingly, ...

hollow bones are essential for flight in most birds, this heavier build allows penguins to maneuver and stay stable underwater. In essence, penguins have sacrificed their ability to fly in favor ...