David Letterman Presents the "Three Musketeers" of Bird-Calling 2.00K Gene Delsener 05/27/10 12:13PM Filed to: The Late Show The Late Show David Letterman Birds Bird calling Wtf TV Video If you take third at a bird calling contest, someone in your group is going to be the ugly duckling to your, say, Northern Gannet flock. Can you spot who? Come for the free pizza, stay for the insane grunting.
