Furbolgs, or “Pumpkin Heads” as we often times call them, are creatures native to the forest which are connected to the changing of the seasons … particularly the changing of summer into fall and winter. They are easily identified as they are creatures that appear to have carved pumpkins for heads.
Furbolgs help the changing of the season by spilling blood upon the ground … namely our blood and the blood of other denizens of the forest.