The largest bird species in the world is the ostrich (Struthio camelus). Native to Africa, this flightless bird is known for its impressive size, reaching heights of up to 9 feet (2.7 meters) and weighing as much as 320 pounds (145 kilograms). Ostriches are characterized by their long necks, powerful legs, and large eyes. They are remarkable runners, capable of reaching speeds up to 45 miles per hour (72 kilometers per hour), making them the fastest-running bird species. Most commonly found in savannas and open woodlands, ostriches play a significant role in their ecosystems and are known for their unique social behaviors.