Run the wire hanger on the top of the birdhouse through a piece of rubber hosing to protect the tree from wire cuts. If the birdhouse does not have a hanger, screw an eye screw into the top of the box and run a piece of rubber-covered wire through the eye screw to hang the box.
A birdhouse with a small hole can deter bird predators better than any natural nesting cavity out there. Look for trees with a diameter greater than 4" to mount your birdhouses and be sure to remove the screws if you ever take down the birdhouse.
How to Attach a Birdhouse to a Tree Without Damage. Slip a nail through a washer that is at least 1/2 inch across. Hammer the nail into the tree trunk at the appropriate height for your breed of bird. Hang your birdhouse at the end of the nail. Choose a sturdy branch from which to hang your birdhouse.
How can I attach my bird houses to the trunks without harming the trees?. definitely one of my pet peeves: Using nails or screws to fasten a birdhouse to a tree!
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