In October 2022 a bird with the code name B6 set a new world record. Over the course of 11 days, B6, a young Bar-tailed Godwit, flew from its hatching ground in Alaska to its wintering ground in Tasmania, covering 8,425 miles without taking a single break. For comparison, there is only one commercial aircraft that can fly that far nonstop, a Boeing 777 with a 213-foot wingspan and one of the most powerful jet engines in the world.

During its journey, B6—an animal that could perch comfortably on your shoulder—did not land, did not eat, did not drink, and did not stop flapping, sustaining an average ground speed of 30 miles per hour 24 hours a day as it winged its way to the other end of the world.

Many factors contributed to this astonishing feat of athleticism—muscle power, a high metabolic rate, and a physiological tolerance for elevated cortisol levels, among other things. B6’s odyssey is also a triumph of the remarkable mechanical properties of feathers. Feathers kept B6 warm overnight while it flew above the Pacific Ocean. Feathers repelled rain along the way. Feathers formed the flight surfaces of the wings that kept B6 aloft and drove the bird forward for nearly 250 hours without failing.

Research shows that feather shape is largely optimized to allow the feather to twist and bend in sophisticated ways that greatly enhance flight performance. Merely being anatomically asymmetrical doesn’t mean much. What matters is that the feather is aerodynamically asymmetrical. That is, the trailing blade needs to be three times wider than the leading one. Below this ratio, the feather twists in a destabilizing rather than stabilizing way during flight.

Editor’s Note: This small bird is one example of the creative wisdom of God. This article goes on to attribute the marvel of the flight in this bird to evolution. However, the Bible says that all of creation shows the glory of intelligent design by God for those who are willing to see it (Ps. 19:1-6; Rom. 1:18-25).