Haha, just had a bird somehow crawl into my wall from an old outside air vent thing about 2 weeks ago, poor thing was flapping and scratching on the inside wall for about 5 days before it finally stopped and then begin stinking - fortunately it's the outside wall to my laundry and back door - so i open the door (have another that i close to the house) and use a liberal amount of fabric softener etc in laundry loads, smell seems to have resolved now - damn birds.