The main vocalisation is the male's loud advertisement call which seeks to both encourage a female to approach and discourage other males from intruding on its territory.
ðə mˈeɪn vˌoʊkələzˈeɪʃən ɪz ðə mˈeɪlz lˈaʊd ˌædvɚtˈaɪzmənt kˈɔːl wˌɪtʃ sˈiːks tə bˈoʊθ ɛŋkˈɜːɹɪdʒ ɐ fˈiːmeɪl tʊ ɐpɹˈoʊtʃ ænd dɪskˈɜːɹɪdʒ ˈʌðɚ mˈeɪlz fɹʌm ɪntɹˈuːdɪŋ ˌɔn ɪts tˈɛɹɪtˌoːɹi.