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| | The Purple Martin Society, NA -- Purple Martin Tower |
 | | There may be other Purple Martin towers, but the tower that Dennis Zwerenz constructed for his colony site and study of martins is truly one of a kind. |
 | | The bottom part of the Tower structure not only anchors and supports the bird housing on top, but functions also as the elevator shaft for the 2,000–pound electric powered winch that carries the floor, and its human cargo, to the observation and nest box areas up at the top. |
 | | Completely vinyl–sided, The Purple Martin Tower is pleasing to the eye and is designed to withstand the rigors, and the poundings, of the elements in different seasons. |
| www.purplemartins.com /Topics/pmtower.htm (2077 words) |
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