Jaybird is the leader of the gang consisting of Smudge and Wormo, who all appear in the episode "Apple Thief." His gang spends it's time stealing "apples" (diamonds), and reselling them. Jaybird assumes that Finn, Jake, and Tree Trunks work for Dr. J, and tries to feed them all to Pig. Before this can happen however, Dr. J comes with his gang, and the two gangs fight while Finn, Jake, Tree Trunks, and Pig escape.
He appears to be an upside down ice cream person. His body is blue and has a cone for a hat. His eyes seem to be always closed. He has freckles and wears red shoes.