Birchseed attended the Entmoot of the Third Age. At that time, there had not been an Entmoot since the Second Age. Birchseed had a large, fat nose with a twig growing out of it. He was called "Eldar Shepherd and a "Tall Statesman". Birchseed was a Birch Ent and was royal and slender. Birchseed helped Treebeard come to the conclusion that the Ents must go to war. Together, Treebeard, Pippin, Merry, Birchseed, and the Ents went to war against Saruman the White. The Ents were angry because Saruman was burning down their Trees. The Ents flooded Saruman's land of Isengard. Birchseed Eldar Shepherd lived in Isengard thereafter.