If you are having trouble attracting Purple Martins to your current habitat and you have had Martin box type houses in the past you may want to try gourds and creating a new habitat. Often predictors have invaded the habitat and the Martins will not return. I have two neighbors that believe a snake was in their Martin Box and they are trying Gourd Martin Houses in hopes the Martins will return.
If you have access to large gourds, the preferred hole size for Martins is 2-1/4", and no perch. The Martins love the swinging motion in the gourd. I love to look out on the line with 20 or more Gourd Martin Houses and they are swaying with the wind. We also have Gourd Martin Houses on our site here at Local Harvest.
Until tomorrow, happy "sky watching".
The Gourd Lady of Rocky Mount