It has been shown that martins prefer to nest in gourds. One reason is their roomier size as compared to the standard metal houses. Many wooden houses also share these benefits. The folks at Wild Birds Unlimited have wooden houses in stock and are trying to obtain nesting gourds. This helps reflect sunlight and keeps the house cooler.
Many people claim success in luring martins by playing a tape of their dawn song.
The tape seems to be most effective when played during the hours before sunrise, but some folks have had success playing it later in the day. Wild Birds Unlimited has cassettes in stock. Consider joining the Purple Martin Conservation Association. Among the membership benefits is Purple Martin Update, a quarterly magazine loaded with helpful tips for prospective martin landlords. Banner Golden-cheeked Warbler photo copyright 1988 Greg Lasley.