The large flightless bird native to Africa is the ostrich. As the world's largest bird, the ostrich can grow up to 9 feet tall and can weigh as much as 350 pounds. They are known for their long legs and can run at impressive speeds of up to 45 miles per hour, making them the fastest-running bird on land. Ostriches have a unique social structure, often forming groups that assist in protection from predators. They are primarily herbivorous, feeding on plants, seeds, and occasionally insects.