S1, E2: In this episode of SuperNature - Wild Flyers, we see how nature has pushed the basic flying body plan to extremes. How do the heaviest animals take off, the fastest use speed as a weapon, or those traversing the widest oceans do so with barely a wing beat? All these record breakers push physics and physiology to the limit, but although each one employs a different aerodynamic mix of speed, manoeuvrability, endurance and power it allows them all, in their own unique way, to become true masters of the sky.