How do you attract purple martins?

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Tags

1. #trees
2. #available
3. #right
4. #important
5. #martins
6. #least
7. #areas
8. #martin
9. #attracting
10. #placed
11. #within
12. #location
13. #clear
14. #choosing
15. #housing
16. #choose
17. #largest
18. #flyways
19. #center
20. #human
21. #prefer
22. #purple
23. #steps