My wife and I were eating lunch yesterday and I heard noises coming from the stove pipe. We have lots of wasps that love our house so I thought it was them poking around the pipe. Then I saw something in the firebox out of the corner of my eye. To my great surprise it was a little bird. My wife snapped a couple photos of the lost traveler and I put on my hearth gloves and reached in and grabbed him and brought him outside. He took off into the air out of my hands. He was rather clean so my pipe must be looking pretty good. How can I prevent this and wasps from nesting in the chimney (or from coming down into the house)? My thought is a garbage bag or something similar over the cap and top of the pipe. Then leave a note in the stove to NOT LIGHT FIRE WITHOUT REMOVING COVER. Any ideas?