Steve, this was posted on one of the horse forums.
Have you seen them?
They can be bought but I'm sure you could easily make one. The critical part is the BLACK ball as it's dark movement that attracts these flies.
http://www.youtube.com/watch?v=PcTaUZBQees
Even being surrounded by beef farms, I have never seen more than a handful in the late summer. If I were swarmed with them, I think I'd have a bunch of these
Have you seen them?
They can be bought but I'm sure you could easily make one. The critical part is the BLACK ball as it's dark movement that attracts these flies.
http://www.youtube.com/watch?v=PcTaUZBQees
Even being surrounded by beef farms, I have never seen more than a handful in the late summer. If I were swarmed with them, I think I'd have a bunch of these