'Phone Call' object - what was it?
During one scene in the film's second half (in Australia), Mick tells Sue he's "going to make a phone call." He climbs up to the top of a hill and swings a sort of flat, paddle-like object (covered in a woven cloth) on the end of a rope, making a sort of buzzing sound and attracting the attention of animals everywhere - as well as the help of his native friends (and not to mention inciting a humorous story from Wally about the "mating call of the 'Jara-Jara bird.'").
Does anyone have any idea what this object is called? Can they be purchased?