More recent Letterman footage, this time it’s banjo-man Tony Trischka:

http://www.youtube.com/watch?v=1jn3KCZEqxc&mode=related&search=

This song is called The Crow, and is from Trischka’s album “Double Banjo Bluegrass Spectacular“.

Trischka is accompanied here by banjo-diplomat Bela Fleck and funnyman Steve Martin.  Your bonus for reading this far is a classic version of Ramblin’ Guy from The Muppet Show:  http://www.youtube.com/watch?v=Wi8NW29xCso