Eagle Winglets
By Sosh (Suzu & Josh)
The problem that this biomimicry solves is that old planes were slow and used a lot of gas. The eagle winglets save up to 3% of gas and flies much faster. The engineers were inspired by eagle wings. They copied the eagles wings to make the plane faster.
In 1976 Richard Withcomb, aerodynamicist. He published a paper that compared a wing with a winglet and the same wing with a simple extension to increase its span. As a basis for comparing both devices, the extension and the winglet were sized so that both put an equal structural load on the wing. Whitcomb showed that winglets reduced drag by about 20 percent and offered double the improvement in the wing's lift-to-drag ratio, compared with the simple wing extension.
This picture is the eagle wing.
This is the difference between plane winglets and eagle wings. 
This is how the plane winglet works. 
This is what the eagle winglet looks like. 
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