Not all birds fly the same way. Hardly a revolutionary statement (you don't need a firm grasp of biomechanics to recognize that a sparrow gets around differently than an albatross). But things get more interesting when you stop to examine the differences.
In this fascinating video from Earth Unplugged, we examine the difference in flight behavior between two skilled aerialists – a peregrine falcon and a raven. It's beautiful to watch – a stunning demonstration of how creatures can evolve even a widely shared trait (the capacity for flight) in the ever-so-specific way required of the selective pressures placed upon it.