One of the characteristics of spotted geese in flight is that they often fly in a certain formation, and the birds behind usually fly behind the side of the previous bird
In speed skating competitions, athletes often advance in the shape of people. One athlete is in the front, followed by three others, and the last three players benefit from reduced resistance.
they have a common human formation. Some researchers believe that this formation can reduce air resistance and flight energy consumption, but opponents believe that if it is to reduce resistance, birds should choose a straight line formation, because one flight after another can minimize the air resistance that followers need to overcome.