Ice Age / Pleistocene (up to 1.8 million years ago)
North and South America
8.2 ft tall
Terror birds such as the Phorusracus were the top killers before humans and sabor toothed cats came to the Americas. Terror birds could not fly, but they grew to 10ft high with huge beaks and large, sharp claws. They probably killed by grabbing prey with their feet and pecking at them with their sharp beaks.