The frigate bird is a powerful and aggressive seabird, with a deserved reputation as the pirate of the high seas. One of world’s fastest birds, he swoops and soars up to 100 miles an hour, spending up to 12 days at a time on the wing, even sleeping in the air. He ekes out a tenuous existence from the resource-poor surface of the tropical ocean, in a environment with little nesting land. To achieve this, the frigate has jettisoned anything not essential to life in the air. His tiny feet and legs do not allow him to sit or walk, and its seven-foot wingspan skeleton weighs only 4 ounces: less than his feathers. What can this exquisitely evolved aerial acrobat teach us about flight? Find out in today’s entry of The Biomimicry Manual.