Dog droppings狗的粪便;狗粪
penguin droppings企鹅粪
Rat Droppings老鼠屎
Eye Droppings点眼
Mouse droppings老鼠屎
fossil droppings粪化石
Bird droppings鸟粪;鸟拉屎
silkworm droppings蚕沙
droppings pit粪沟
Dropping impact is one of the most important causes for fruits` damage.
而跌落冲击是导致果实损伤的重要原因之一。
参考来源 - 男子下体动态变化及贴体裤装结构研究N-PLURAL（复数型名词） Droppings are the faeces of birds and small animals. (鸟类及小动物的)粪便
...pigeon droppings.
...鸽子屎。