The geese “fall in”, ie choose their side, “ for the very practical issue of “which side is less work.” The wind, anticipated turns, and similar factors determine which side will grow longer … and it may flip further into the flight.Science quiz time!
It's migration season for the geese, and we see them flying along in formation each day.
When you look up at the "V" formation they fly in together, one leg of the "V" is almost always longer than the other.
You know why?
"Because it has more geese in it!