Anyone else experiencing a squeak (sounds like a bird) which sounds like it's coming from the back seat? It's definitely coming from inside the cabin, but I cannot pin point it while driving. Any suggests for fixing it?

 

Pinpoint the location. Find someone to ride in the backseat. It's usually difficult to pinpoint the location from the driver's seat because sound travels real funny around the car. It might even be the spare tire moving in the trunk.