Skein of Geese

Why do they fly like this? - I hear you ask....
By flying in "V " formation, the whole flock adds at least 71% greater flying range than if each bird flew on its own.
Whenever a goose falls out of formation, it suddenly feels the drag and resistance of trying to go it alone and quickly gets back into formation to take advantage of the lifting power of the bird immediately in front.
When the lead goose gets tired, he rotates back in the wing and another goose flies point.
These geese honk from behind to encourage those up front to keep up their speed.
So now you (and I) know........t'internet's a wonderful thing...