Airfoil, other "V" wind deflectors, and one lead duck

HMS Beagle wrote:
Flights of ducks and truck mounted campers have virtually nothing in common aerodynamically. The lead duck does not "break" the air. But it is a nice romantic thought.

uh huh.

"A V formation (sometimes called a skein) is the symmetric V-shaped flight formation of flights of geese, ducks, and other migratory birds. V formations also improve the fuel efficiency of aircraft and are used on military flight missions."

source:

wiki