The study found that each bird flapping its wings provides lift for the bird directly behind it. Thanks to this design, the entire flock increases flight speed by at least 71% compared to the speed that each bird can develop individually. (People who move consistently in a common direction achieve their goal faster and at less cost.)
As soon as one goose falls out of the general flock and tries to fly alone, he immediately feels heaviness and resistance. And he returns to the flock to take advantage of the lift created by the flying bird in front. (If we humans were as intelligent as geese, we would always stick together.)
When the leader gets tired, he returns to the end of the school, and another goose stands at the head of the flock. (Taking turns doing the hard work is much easier.)
The geese at the end of the flock scream, encouraging those in front not to slow down. (What are we shouting from behind our leaders?)
And finally, if a goose falls out of the flock after being ill or injured, two other geese also leave the flock and follow him to give him help and support. They stay with this goose until it recovers or dies, and then set off on their own or with another flock to catch up with their own.
If we, Rus, were as intelligent as geese, we would also support each other.