House placement is very important to successfully attract martins. It should be placed in the largest open area 30ft to 120 ft from human homes as well as 30ft to 60 ft from any trees. The house should be between 10 ft to 15 ft from the ground.
You should be able to manage your house easily.
Don’t assume there are no predators because you don’t see them , a lot of their predators attack at night. You can get external guards to protect against owls, hawks and crows. Pole guards are very important to protect against rat snakes, squirrels and raccoons.
Opening your house at the right time will greatly help to keep the starlings and sparrows from invading your martin house. The adults (for returning martins open your house about the same time they arrived last year, but wait till you see some in the area) go back to their previous breeding site so new landlords will want to attract the subadults to your house, these last year babies arrive about 4 to 6 weeks after the adults. You should keep you house closed till 4 weeks after you see the adults arrive. Also don’t close your house to early and keep it clear of other birds they start nesting up until the end of June.
You will need to tear out nests, trap and or kill any Starlings and House Sparrow these are non protected birds and are non- native. They are very aggressive and often kill or injured the Purple martins.
Check your house regularly. A weekly check of nests will help discover any problems that may arise, also do a daily walk about checking for feathers, thrown-out nestlings, dropped insect prey, hatched eggshells, etc. These can be clues to alert you to any problems.
Keep your martin house in good repair.
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