When the goose flying in the front of the formation has to expend the most energy because it is the first to break up the flow of air that provides the additional lift for all of the geese who follow behind the leader. Consequently, when the lead goose gets tired, it drops out of the front position and moves to the rear of the formation, where the resistance is lightest, and another goose moves to the leadership position. This rotation of position happens many times in the course of the long journey to warmer climates. When a team is functioning well, various members of the team may take the leadership role for a while because of a particular expertise or experience. Consequently, on good teams, everyone has the opportunity to serve as a leader as well as a follower.