What is the fastest bird on foot?

The fastest bird on foot is the ostrich. This large, flightless bird is native to Africa and is remarkably adapted for running long distances at high speeds. An ostrich can sprint at speeds of up to 45 miles per hour, making it not only the fastest bird but also one of the fastest land animals. Its long, powerful legs and large strides contribute to its exceptional speed. In comparison, the other birds listed, such as eagles, falcons, and penguins, are either adapted for flight or have significantly slower movement on land. Eagles and falcons are known for their aerial prowess, while penguins are primarily aquatic birds that waddle on land, making them much slower than the ostrich.