The Whipbirds' long whip call, one of the most characteristic sounds of the Australian bush, is performed as a duet. The male makes the drawn out whip crack and … Although the birds themselves often remain hidden in the undergrowth, their sharp, whipcrack-like calls are loud and distinctive. Eastern Whipbird Calls – Cracking Duets The call of the Eastern Whipbird (Psophodes olivaceus) is one of the most iconic sounds of the forests of eastern Australia.