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Adult purple martins come back to the breeding area a month before the young, first-time breeders. By the time the young adults return and look for a colony to join, the oldtimers are chattering away all day long. Their songs attract the young Purple Martins and let them know this is a good place to set up housekeeping.
Playing this CD near your new martin houses is a way of inviting the young to stop and nest. It gets their attention long enough for them to realize you have some pretty nice housing in place. It's worked for many Purple Martin landlords!
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