noctiseran:

Scottish myth and folklore

The Ghillie Dhu or Gille Dubh is a faerie, a guardian spirit of the trees. He is kind to children, but generally wild and shy. Said to be dark haired, he is described as clothed in leaves and moss.. He especially likes birch trees, and is most active at night. In lore, this solitary spirit is said to reside primarily near Gairloch and Loch a Druing.