 The sisters are said to have helped draw linguistic and social differences amongst the clans in Arnhem land, but the ceremonies associated with their stories create cultural unity.According to the story, the sisters were traveling  to the Arafura Sea but had to stop as the elder sister was about to have a baby and needed to rest.Later on, the elder sister goes in the river to bathe with her child and the smell of afterbirth blood awakens, Yulunggur, the rainbow serpent who then comes out of its waterhole and swallows both sisters and the baby.