The Old Ruminator said:
https://www.gardeningknowhow.com/composting/manures/bat-guano-fertilizer.htm
I collect a sackful every year for my garden.
It seems that UK and US cavers differ in their "official" attitude concerning bats. Is this because of differences in climate and bat behavior or simply in priority or understanding? Many many caves here are "closed" during hibernation. Many more maternity roosts are closed again later in the year. No one in this thread has differentiated between hibernaculum, maternity roost, or summertime roost, but are these treated differently?
While US caving organizations often have very strict bat policies, I have not seen much evidence that they are ecologically meaningful. They are regularly ignored if vehemently preached. Anyway, an overabundance of fabricated and illogical concern for a few specific species of spelean creature is one of the hallmarks of ignorant caver hypocrisy both here and there.