National Museum of the Philippines - In celebration of the #InternationalBatDay tomorrow April 17, today's #DignayanBiyernes features a mineral deposit made from the poop of bats — the guano. Guano, commonly known
![Guano Bird Or Bat Droppings On A Grey Metal Surface Closeup Stock Photo - Download Image Now - iStock Guano Bird Or Bat Droppings On A Grey Metal Surface Closeup Stock Photo - Download Image Now - iStock](https://media.istockphoto.com/id/1145646288/photo/guano-bird-or-bat-droppings-on-a-grey-metal-surface-close-up.jpg?s=612x612&w=0&k=20&c=--vogk9Tnjv_jlhXGRdl_w3iXoYl4kA-VpYyAP1DAaM=)
Guano Bird Or Bat Droppings On A Grey Metal Surface Closeup Stock Photo - Download Image Now - iStock
![Archivo:Cave Cockroaches (Pycnoscelus indicus) "swimming" in bat guano (15318404609).jpg - Wikipedia, la enciclopedia libre Archivo:Cave Cockroaches (Pycnoscelus indicus) "swimming" in bat guano (15318404609).jpg - Wikipedia, la enciclopedia libre](https://upload.wikimedia.org/wikipedia/commons/9/98/Cave_Cockroaches_%28Pycnoscelus_indicus%29_%22swimming%22_in_bat_guano_%2815318404609%29.jpg)