Wiradjuri is a Pama–Nyungan language of the Wiradhuric subgroup. It is the traditional language of the Wiradjuri people, an Aboriginal Australian people of New South Wales, Australia. Wiraiari and Jeithi may have been dialects.

Kookaburras are terrestrial tree kingfishers of the genus Dacelo native to Australia and New Guinea, which grow to between 28 and 47 cm in length and weigh around 300 g (11 oz). The name is a loanword from Wiradjuri guuguubarra, onomatopoeic of its call. The loud, distinctive call of the laughing kookaburra is widely used as a stock sound effect in situations that involve an Australian bush setting or tropical jungle, especially in older movies.