The Terror Birds
Terror birds were big, vicious and fast. Although scientists cannot be sure, they estimate that the larger of the terror birds would have been capable of speeds in excess of 30 miles per hour.
South America was not the only place to have been home to giant birds. Aside from the Ostrich and Emu, Australia has been home to many large birds throughout history. These would have no doubt been encountered by the early inhabitants of the area. In New Zealand, early Polynesian settlers came across the Moa, twelve foot tall, herbivorous birds. Amazingly these lasted until around 1500, when they were hunted to extinction. Unbelievably, until the arrival of the Maori, the Moa were hunted by a species of giant eagle. The Haast's Eagle had a wingspan of ten feet and was the largest eagle to have ever lived.