1.   Although bat guano makes a great fertilizer, it can bring tears to the eyes from its overpowering and earthy ammonia scent.

2.   Bat guano is killing them.

3.   Bat guano may be on the ceiling, but it may be solid enough not to stain the ceiling.

4.   A bat hut includes bat guano, or bat droppings, which emit an odor that will, in time, attract the flying rodents.

5.   After that, they swam and canoed in a storm-swollen river, then waded through caves filled with bat guano.

6.   That is a load of pure bat guano.

7.   They also have done extensive research on bat guano.

8.   We were up to our necks in this stuff that was supposed to be bat guano.

9.   The stench of bat guano is pervasive around the old church near the edge of Canoe Creek State Park.