 Based on studies in New Guinea the bird calls much less frequently during the non-breeding season.The most commonly heard call has been described as an ascending "ch-kow, ch-kow", "chop chop", "chuga, chuga" or "tcherwill tcherwill" repeated 4-5 times.Each call is usually accompanied by continuous flicking of the tail, often pointing their heads skyward, pulling their wings downwards and fluffing up their white feathers.