![]() These conical grids keep humans and animals from falling down the mine shafts and allow the bats that roost in them free comings and goings! A very sensible idea.
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![]() These conical grids keep humans and animals from falling down the mine shafts and allow the bats that roost in them free comings and goings! A very sensible idea.
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7 comments so far...
Here the bats must live mostly in black appartment box units made from wood concrete and hung somewhere at the forest edge just for them.
I never saw any bats here!
I wasn't allowed out on the cliff tops after dark! :o)
Tin, in the main, with some copper and arsenic. Cornwall was the world centre of tin supply in the 18th and early 19th centuries.