They have only been there about 3 months the owner said. I looked at it with my infrared camera and saw this was a big hive in the wall. I tried to listen to them with my stethoscope but couldn’t hear them. We put up the paper to protect the walls and floors and got to it. We cut the sheetrock and pulled out the piece, low and behold there was another sheet behind it! Not wonder I couldn’t hear the bees. Then we cut another hole where we thought the hive ended. The hive went almost to the bottom of the window! It was about 5 feet long. I don’t think it had been there 3 months. We took about 10 pounds of honey out of this hive.