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A lower hole will not provide adequate protection from predators and weather, and young birds could more easily topple out of the opening. Entrance height: The entrance hole to the house should be 1 inch above the floor.Crescent-shaped holes can also be effective in preventing other birds from using the houses, but purple martins have no trouble with that unusual shape.
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The reflective roof and ceiling panel offer proper. Entrance holes measuring 2 1/8 inches are the most popular. This 2-story nesting box bird house provides family-sized shelter for purple martins all season long. Entrance hole: The diameter of the entrance hole should be between 1 3/4 and 2 1/4 inches.All plans include detailed reduced scale drawings and step by. All Efforts were also made to attract purple martins, birds that had. Book includes 4 different Unique and time tested Purple Martin Nesting House woodworking plans. The Spruce Home Improvement Review Board Leroy Combs's management plan called for the construction and monitoring of bird.
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