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1. Birds --> Jets

Short and pointed wings of birds like falcons and hawks have inspired fighter jet designs. These wings allow for quick maneuverability and high-speed flight, essential for aerial combat and evasive maneuvers. The avian example has guided engineers in optimizing the balance between lift and agility, leading to advancements in both military and commercial aviation.

2. Spider webs --> bullet proof vests

Spun into fibers or printed as gels, they can be used to improve existing and develop new applications that could prove invaluable equally to the civilian population as well as for military applications. Examples include applications in medicine, such as scaffolds for bone regeneration; in optics and electronics, as biomimetic muscles for robotics; and as high-tech threads and textiles, as are needed for parachutes, bulletproof vests or mobile shelters.

3. Maple leafs, helicopters

The rotation of samaras is due to the location of its center of gravity which is found near the terminal end of the wings. The wings of the seeds of the Maple tree generate a stable leading-edge vortex (LEV) which accounts for the lift force slowing down the descent. Note that an LEV is a type of airflow that is halfway between a steady and a turbulent flow. Upon being detached from the tree and is released into the air, the very shape of the wing initiates the stable vortex.This could be used to create a new type of air craft that uses aerodynamics