Droppings are the waste an animal leaves, used to identify it. Rabbit droppings, mouse droppings, fresh droppings.
Trackers read them for species, diet and how recently the animal passed, and the shape and size are as identifying as a footprint. The word is always plural and it is the polite one — scat is the technical term and there are blunter words. Note drop, from which it is formed.
1noundroppingsThe waste an animal leaves.
“We found mouse droppings in the kitchen cupboard.”
droppings is animal waste.
dropping by surface analysis, drop + -ing.
Etymology from Wiktionary, CC BY-SA