American White Pelicans feed from the water’s surface, dipping their beaks into the water to catch fish and other aquatic organisms. They do not plunge-dive the way Brown Pelicans do. They are superb soarers (they are among the heaviest flying birds in the world) and often travel long distances in large flocks by soaring. They can grow to an astonishing 9.5 feet in length, 5.5 feet long and weigh as much as 20lbs. I've seen flocks in FL, UT and WI that number over a thousand.