Invite purple martins to colonize in your yard by offering the Birds Choice Starling Resistant 4 Floor-16 Room Purple Martin House. The SREH (starling resistant entrance holes) is a tried and proven method for helping to eliminate the pesky European Starling. Tests have shown the entry holes are 99.8% effective in achieving this. This hole is cut to an exact height restricting starling entry but allowing safe entry for the Purple Martin which gives it a greater sense of security. The SREH Mansions come with all cool aluminum and stainless steel construction, reflective roof, ceiling panel for proper ventilation, porch dividers, hinged clean out doors, guard rails, top perch, and an all aluminum base plate. Each room 6 x 6. The SREH Purple Martin House is available fully assembled or un-assembled. House come with base plate adapter for mounting to pole. Adapter will fit any pole with inside diameter of 1-1/2
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