The peregrine falcon is the fastest animal in the world. It hunts other birds and landmarks often from very high before attacking Then it dives in a fraction of a second by folding these wings to better crack the air. If its prey is hidden, the maneuver can become dangerous. At high speed, a collision with a tree would be fatal. To increase chances and avoid accidents, the peregrine falcon hunts in open areas. The fields are his favorite terrain, especially when they are populated by unsuspecting birds, like the pigeon: its favorite prey. He is not an easy target. At a certain altitude, they fly very fast, sometimes faster than the peregrine falcon. The predator must play its aerodynamics to achieve its ends. Folding these wings, it reduces the resistance of the air to a minimum, which allows it to reach 320 km / h. When it is preparing to hit, the talons forward, the force of the impact is such that the slightest mistake could be fatal. Despite its speed and extreme agility, the peregrine falcon fails most of the time. Each time, he must draw in his last strength to go back to very high altitude. This balance of energy spent and risk taking is crucial for all high-speed predators.