When we talk about ‘birds’, we often think of beautiful-feathered creatures that fit in our hands. Larger birds like owls or hawks size from 9 to 16 inches. But if there’s a kind of bird that can make you surprised by its size, it is the Harpy Eagle. The bird is 3 feet 5 inches tall, and its wingspan can reach up to 7 feet 4 inches. Some people even think it’s a human in a bird costume.