Guano (from Quechua wanu via Spanish) is the accumulated
Seabird guano consists of nitrogen-rich
Bat guano is fecal excrement from bats. Commercially harvested bat guano is used as an organic fertilizer. All commercially sold bat guano is derived from insect eating bats. A study was done that demonstrated that, for fruit bats and insect bats, the composition of their guano was largely the same, and differed mainly based on their diet.