# Why is it called bat "droppings" crazy?

**URL:** <https://forum.kirupa.com/t/why-is-it-called-bat-droppings-crazy/330199>\
**Category:** random\
**Created:** [December 13, 2012, 10:32am UTC](https://forum.kirupa.com/t/why-is-it-called-bat-droppings-crazy/330199 "2012-12-13T10:32:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lnsiu](https://avatars.discourse-cdn.com/v4/letter/l/9fc29f/32.png) [@lnsiu](https://forum.kirupa.com/u/lnsiu)\
**Post date:** [December 13, 2012, 10:32am UTC](https://forum.kirupa.com/t/why-is-it-called-bat-droppings-crazy/330199/1 "2012-12-13T10:32:42Z")

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There seems to be nothing crazy about bat “droppings”?

Instead bat “droppings” or guano, has a history of being important in agriculture and nothing of the sort in connection to the phrase? ([COLOR=#000000][FONT=sans-serif]8 to 12 percent equivalent phosphoric acid, and 2 to 3 percent equivalent [/FONT][/COLOR][potash](http://en.wikipedia.org/wiki/Potash)[COLOR=#000000][FONT=sans-serif]. Bat and seal guano are lower in fertilizer value than bird guano.)[/FONT][/COLOR]

There is on wiktionary the phrase “have bats in one’s belfry” from 1899. And explains the original as the tendency of bats to fly around erratically?

But I find that as an explanation a bit far fetched?  
Does bat guano make you ill?