2007 Mountaineer owles lving in cargo area
 

Have an 07 Mountaineer purchased new. Has approx 77k mileage. Its a 2WD V8 Premier package. For the past 14 mos (give or take a few) it sounds like we have a family of owles in the 3rd row seat area. Noise occurs while driving or while still. Either or both AC's can be on or off. Went to dealer and service advisor told me his neighbor has a 07 Explorer with the same problem. Their shop had it for 3 weeks and couldnt find anything.
Anybody have any ideas?????
email is firetruckman@hotmail.com
Thanks for any help you may be able to give