Watched QVC states it caught flies ... even demonstrated emptying containers full of flies. However I own a horse farm and in over 1 month has only caught 5 flies. I bought 2 of the largest...even added fly lure to 1 .... the flies were walking around the outside .... couldnt figure out how to get in .... the few I saw go to the top didnt like the breeze and left the area instead of being attracted to going in. Unless you want a moth collection dont buy