Noting that the local penguins are fascinated by airplanes, the pilots search out a beach where the birds are gathered and fly slowly along it at the waters edge. Perhaps ten thousand penguins turn their heads in unison watching the planes go by, and when the pilots turn around and fly back, the birds turn their heads in the opposite direction, like spectators at a slow-motion tennis match.

Then, the paper reports, "The pilots fly out to sea and return directly toward the penguin colony and over-fly it. Heads go up, up, up, and ten thousand penguins fall over gently onto their backs."

Audubon Society Magazine