Bird of Prey bicycle positions the riders in a semi-prone position. As you can see in the image, the rider lies front-down while looking up ahead. The leather pads support the hips, elbows, and hands, while the legs are at the pedals far back behind the wheel as if they were flying like Superman. This position is said to improve the bike and the rider’s aerodynamics while keeping the center of gravity low, allowing quick and agile handling.
Source: Bird of Prey