Use Decoys and CDís/tapes Ė they work! Martins are social and visual and audile decoys create the appearance of site activity, like cars in the parking lot of a good restaurant.
If at first you donít see martins, donít despair. The migration lasts through the end of June! Be diligent, and keep your house maintained. Also, keep your house up through August. While this is too late to attract nesting pairs, this yearís fledglings will already be scouting for next season.