Flying In Formation

Traversing to French Class this morning, I noticed Canadian geese flying south for the winter.

How do they know to fly in that V formation?

How do they know that the V gives them less drag and more miles per bird?

How did they figure that out?

Even the instinct -- how did that occur?

Did one of the prehistoric bull geese say one day,

Boys,

I think if we fly in a V,

we'll go farther,

faster with less drag.

How 'bout it, mes amis?

I just wondered.