National Geographic : 1950 Feb
© National Geographic Society 259 Painting by Walter A. Weber To Win a Mate, a Sicklebill Raises False Wings as if Doing His "Daily Dozen" Trying to impress the female (left), the bird opens his yellow-green mouth. In flying, his two-foot tail serves as brake and rudder. Usually, false wings are hidden. At right a rival shows the true wings.