Why Birds Fly in "V" Formation

Scientists believe the "v" formation gives large birds an aerodynamic advantage that helps them conserve energy. French researchers measured the heart rates of great white pelicans, and found their heart rates slowed when flying in this formation. They were also able to glide more often. The birds can flap their wings in unison, and draft behind one another, much like cyclists do in the Tour de France. It's also believed that a close group formation improves communication between the birds.