I may try to get Purple Martins again. I tried for four years using a 16 room aluminum house on a telescoping pole and a recorded Purple Martin call. I did bring in a male and two females but they didn't stay. The Martin House is just setting in the pole barn and I need a new telescoping pole but I am thinking of trying this again. In the meantime the Tree Swallows are as fun to watch and eat bugs like the Martins. And they are making new Swallows for the pond.