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yard violates this 60 foot rule, try mounting the housing higher relative to the trees, moving the martin house to a more open area, or, as a last resort, cutting down one or more trees. Remember, trees and purple martins do not go together.
The single biggest reason people fail to attract martins is that they place their martin housing incorrectly within their yards, or their yards are inappropriate martin habitat to begin with.
Martins will settle in housing that is placed between 12’ and 20’ high.
They have been known to nest higher, but for the average site, anything between the two numbers mentioned should work.
Thought should be given to predators. Any animal, bird or reptile that will take either the eggs, young or mature birds is considered a predator. Any site that is not predator proof will have difficulty in attracting martins.
Regardless of the type of housing you have and the type of pole it is mounted on, make sure it has a good working predator guard. One raid by a predator and the site will be abandoned and the birds will not return. If the birds have not settled in yet, they will look the place over very intently, and if they do not feel safe, then they will leave.
Predator guards are cheap and are well worth the money and effort
95.5%