Bird House Hole Size: The Number That Picks the Tenant
Entrance diameter decides which species can use a box and which predators cannot. A size chart, the dimensions that go with each, and why perches are harmful.
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Squirrels jump 10 feet sideways and 4 feet up, so placement defeats more of them than any feeder design. The mechanisms that work, and the ones that don't.
Entrance diameter decides which species can use a box and which predators cannot. A size chart, the dimensions that go with each, and why perches are harmful.
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