Inviting Humans to Sprout Wings and Soar
By James Gorman
April 15, 2003
http://www.nytimes.com/2003/04/15/science/15BIRD.html?8hpib

It's one thing to know birds, another to join the flock in the air. Some
scientific consultants on the film "Winged Migration," a documentary on the
great travels of birds, had the chance to fly with the creatures they study
on an ultralight aircraft that was the moviemakers' primary tool.