Great Bustard: The World's Heaviest Flying Bird — Kirsten Hall

Many birds can flap their wings and then glide through the air. The great bustard isn't like them, however. It has to flap its wings all the time when it flies. If it didn't, it would fall to the ground. After all, some of these big birds weigh up to 46 pounds (21 kg). Look inside to find out where the world's heaviest flying bird lives, how it stays safe from enemies, and how the young learn to fly.