SUMMARYRooke, I. J., and T. A. Knight. 1977. Alarm calls of honeyeaters with reference to locating sources of sound. Emu 77: 193–198.The alarm calls that are given in response to a flying hawk by the New Holland HoneyeaterPhylidonyris novaehollandiae, the White-plumed HoneyeaterLichenostomus penicillatusand the White-naped Honey- eaterMelithreptus lunatusare described. Animals locate sources of sound by comparing differences in intensity, phase and timing cues of the incident sound at each ear. These processes are explained and previous explanation is criticized. Some animals create more directional cues from incident sound with pinna. The structure of the alarm calls of honeyeaters makes them easy to locate and some honeyeaters possess specialized ear-feathers that may function as pinna. The function of the alarm calls is discussed with reference to survival value.