Extreme Flight Tracked by Electronics on Frigate Birds

Named for fast-moving French warships of the 18th century, the frigate bird is built for gliding. With one of the largest wing surface ratios of any bird, they soar from the ocean surface up to the high clouds, staying aloft for weeks at a time. Recently, scientists traveled to Europa Island, a speck of land in the Mozambique Channel between Madagascar and the African mainland, to study their navigation patterns. What they found pushes the limits of flight physics. Here is a bird that flies...