There's a thought Joe, an accordian with banjo and bodhran backup. If that doesn't run the little feller off, he's probably some kin to Catspaw's ocarina, in which case I suggest someone pick him up gently and blow up his butt to see if he is also musically inclined!

As for SeanM's suggestion, many local humane societies will come set a trap and then transport the critter to safer environs.