Geese flying formations are commonly referred to as V-formations, due to the shape of the flock when viewed from above. This type of formation is used by geese and other birds for a variety of reasons, including increased efficiency in flight, improved navigation, and better communication between members of the flock. The V-formation also allows the birds to take advantage of the air currents created by the flapping wings of the birds in front of them, allowing them to conserve energy and fly further distances.