We have rabbits, and that spells flies, bugs, mosquitoes and all the buggy miseries of the world.  Believe it or not, this zapper does attract flies, but not quite in the quantity that we would like.  I will keep my eyes peeled for a future version that focuses primarily on flies, as we also have horses, cows, hogs, and goats, and the flies have made our place their forever home.  Now nighttime is a hoot, as we can sit in our yard swing and have some great entertainment watching 'the big ones' fry.  It's a lot more fun than watching a boring drama show on TV.  This zapper really does a good job for general bug elimination, especially after dark.  At the moment we have ours dangling under the hay awning yet over the rabbit pen.  We are using the rabbits to lure the flies away from the horses, goats and cows.  It seems to help.  As a matter of fact, we intend to spend our 4th of July watching the bugs fry instead fighting crowds and traffic to see fireworks.  This is every bit as much fun!  Then you get that one huge bug, and you think about 'Old Sparky' as it fries, and fries, and fries...