Big Bird Doesn't Fly
From Muppet Wiki
"Big Bird Doesn't Fly" is a Sesame Street song performed by the Squirelles about birds that don't fly. At the end of the song, the Squirrelles ask Big Bird why he doesn't fly, and he responds "I just haven't learned yet." When he mentions that he's heard that some squirrels can fly. However, the Squirrelles jump off the wall in a futile attempt at flight.
