Here is a great weapon against your poo flies. It is a green anole.
They are all over the Houston area and love to hang out on my hibiscus.
I know they eat flies because I watched one eat a fly.

Doll i love that picture,he looks a right cheeky chap. Like Dave in AZ [does that mean Arizona] we have a lot of gecko's,they are wonderful in the house but i have never seen any in the garden.