A softwood box with access slit at the base and a hinged lid. As wooden boxes are quite susceptible to temperature fluctuation, they are often used in threes on trees, facing different aspects eg SW, SE and N, to offer the bats a choice of conditions.
Wooden boxes should not be painted or treated with any type of preservative. The box can be expected to last 5-10 years. Weight 1.8kg.
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