Airplane manufacturers have to make sure their planes can survive striking birds while the plane is at full speed. So, (dead) chickens are fired from large cannons at aircraft and engines to test their durability. The results can be messy, to say the least.
The testing is crucial to pilot safety and the survivability of the aircraft. The video below shows how much an F-16 canopy can flex without breaking, protecting pilots from taking a bird to the face at supersonic speeds.
Engines get similar treatment to make sure they'll chop up and spit out a bird and keep running. The planes and their engines are also tested for how they perform when ice or liquid water is sucked through the engine.