We have been observing animals for as long as we have been on earth.
The observation of wild animals is not only a thing of beauty but also a tool for survival. Even today we have to be careful because there are indeed animals that can hurt or kill us under the right circumstances.
As we observed them we also learned from them.
There is as much a reason that birds fly in a vee pattern as there is that a basic military formation for planes is a vee pattern.
The other trait they have in common is that they are both neat to capture in a photo.
Photo credits: Dave Willman.