The Darkening Wild
Children of Ungoliant hunting beneath Mirkwood's boughs
Reaching horse-size and perhaps even larger, the giant spiders of Mirkwood are terrifying, intelligent predators. Their webs are visible almost anywhere in the forest, and their paralyzing sting has claimed many victims. Their usual fair is presumably other animals, unwary Elves, and the Orcs and Goblins of the Mountains of Mirkwood, but they will eat anything, and they prefer prey that struggles and can experience fear.