David Djarrka and his wife Wendy Galanini Yunupingu collaborate on Mokuycarvings. They collect the wood together, discuss the story and the form the carving will take. David generally carves the wood while Galanini will paint it. The artists have the authority to paint and carve the stories of their grandparents, parents, brother and sisters. Mokuy are ghosts or spirit beings. Different Mokuy belong to different clans and have unique personalities. David and Wendy can only carve the Mokuy that belong to their clans.