Canada geese fly in a V-formation to save energy.
CBC.CA
September 21, 2009
by Sharon Oosthoek
Bird migration looks like a bad idea at first glance — all that energy needed to fly thousands of kilometres, all those predators along the way and the promise of doing it all over again just a few months later.
But of course Mother Nature knows exactly what she is doing. If you’ve ever wondered, as we did, what all that back and forth across the sky is about, read on.