Everything in the world is assigned a moiety, and it forms one of the most im-portant principles within Jawoyn society.
The moieties Duwa and Yirritja and all the things associated with them bring bal-ance to the natural and cultural world.
Each moiety is associated with particular colour and proportions: Dhuwa colours are darker (red and black) and associated with shortness. Yirritja colours are lighter (yellow and white) and associated with tallness. For example, the black cockatoo is Dhuwa, the white cockatoo is Yirritja, the short neck turtle is Yirritja, and the long neck turtle is Dhuwa.
Through a traditional marriage system, a child’s moiety will be the same as
his/her father and opposite to his/her mother. Simply a Dhuwa person should marry a Yirritja person.