Wak is the language word for black crow in many Kakadu and West Arnhem language groups. It is also the name for a significant and sacred djang (dreaming) site in West Arnhem Land at a place called Kurruldul, specific to bininj (aboriginal people) of the Kurulk clan. Often when artists depict this djang, the rarrk (crosshatching) painted is representing 'Djimarr' , the black crow that resides at Kurruldul. It is said that the 'Djimarr' took the form of a rock formation that now sits at the bottom of Kurrurldul creek. This design is sometimes used in sacred ceremonial practices in Arnhem Land, which is painted onto bodies, representing 'Djimarr'.