Ostriches are large, flightless birds native to Africa. They are the world's heaviest birds, capable of reaching heights up to 9 feet and weighing as much as 350 pounds. Their long legs allow them to run at speeds of up to 45 miles per hour, making them the fastest-running birds. These birds have distinctive features, including a long neck, large eyes, and a fluffy body covered in feathers. Ostriches primarily feed on plants, seeds, and insects. They are known for their unique behavior of laying the largest eggs of any bird, which can weigh around 3 pounds each.