Treebeard, otherwise known as Fangorn, was an Ent, and the Eldest living thing at the time of the War of the Ring. He was the Lord of the Fangorn Forest, apparently related to evergreen trees. Treebeard was nearly fully responsible for the storming of Isengard by the Ents and flooding of Orthanc. He also sent the Huorns to the Battle of the Hornburg.