Sentence:  Without <WSD>dung beetles</WSD>, the world would be a dirtier place. Animal dung can carry "parasites" and other germs that can make livestock sick. Farmers and ranchers need <WSD>dung beetles</WSD> to keep their pastures clean. <WSD>Dung beetles</WSD> clear away 80 percent of the cow manure in the whole of Texas. 
Meaning of the word marked with <WSD> tags:  Any of the beetle of the family Scarabaeidae (scarab beetles), especially of the subfamilies (ver=190226) and (ver=190226), noted for rolling dung into balls for use as food or as brooding chambers.