Here’s three terrific ways to control horse and deer flies and other Tabanid family flies!
The easiest ways to control horse and deer flies is by simply buying the H-Trap! All you have to do is place the H-Trap in a sunny area between the source of Tabanid Flies, typically ponds and streams and your animals (and beyond your animals’ reach). Horse and Deer Flies are attracted to the dark ball, thinking it is an animal and blood meal. When the flies hit the ball, they fly up and get trapped in the collection cup at the top. Voilà!

If you have some spare time, you can build your own Manitoba Trap. We have instructions for how to do this at ManitobaTrap.com.
Another trap that works pretty well is to get something like a kickball and paint it blue (deer flies are particularly attracted to blue), then cover the ball in a product called Tanglefoot (you can usually find this at places like HomeDepot), then hang the sticky blue ball in a tree near where you spend time but beyond your animals reach.
Tabanids are vicious biters to you and your horses.
Are you not sure what types of flies you have? You do need to have the correct fly traps for different flies. Click here to learn more about flies and their corresponding traps.