I had a forty-five minute drive home the other day. It was late afternoon, and I was tired, dreading the drive home.
Suddenly the sun broke through the clouds in an afterthought, so I looked up to see a little blue sky. High overhead was a V-formation of ducks or geese, headed north. I watched them as long as I could. Two other formations came along, then. I slowed down so I could see them longer.
As the road turned, I could see a large group of them from the back, and I saw something new (to me!). Occasionally, a bird near the front of the formation would move a little sideways. All the rest of the birds in that line followed that one exactly, and so the whole line rippled, like a wave in water. It happened in several waves.
I was amazed at the sight of how closely they followed, how precisely each one imitated the one just ahead. It was a beautiful thing--a ripple of birds.
The picture is from this site: ifornature.blogspot.com/