harm from the repercussions of bird droppings on an environment

(anatomy) stomach / (anatomy) intestines

(anatomy) stomach / (anatomy) intestines

to excrete feces, defecate

feces / dropping removal

guano

(idiomatic) tagalong

Alternative spelling of 糞垂れ: (rude) a dingleberry (a clump of feces hanging near the anus); (derogatory, slang) a dingleberry, a shithead (used as an insult)

A piece of rotten wood cannot be turned into something beautiful. That is, a person whose spirit is rotten cannot benefit from education.

Alternative spelling of 珍紛漢