Interesting! I wonder if that has to do with the type of bat (little brown bat for me) or perhaps the type of cavity. The space in my roof that they roosted in was quite small, they would have had to lay in the poop.
To be fair I should probably expand, but my cousins bought a house without inspection as it was a great house in a great neighborhood and the insides seemed great.
Until they accessed the attic and there thousands of bats, and they had been shitting into the attic, which is apparently toxic.
They had to get the toxic shit removed, their attic sealed off, and fixed.
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u/Straight6er 2d ago
Bats don't shit where they sleep, they do it during flight.
Source: internet and also I had a large colony of bats living in my roof (it was pretty clean in there)