1) Geese fly in a V formation to increase flying range, with each goose lifting those behind it. This allows the flock to travel 71% further than if flying alone.
2) Any goose that falls out of formation feels increased drag from flying solo and quickly returns to the V. Working as a team allows geese to travel further than individually.
3) The geese take turns leading and provide encouragement, protecting sick or injured members of the flock until they can fly again or die. Their teamwork allows them to travel efficiently and look out for one another.