ðə spˈiːsiːz wʌz pɹˈiːviəsli θˈɔːt tə hæv ɐ mˈʌtʃ wˈaɪdɚ nˈeɪɾɪv ɹˈeɪndʒ ɪn sˈaʊθiːst ˈeɪʒə, bˌʌt ɪɾ ɪz nˈaʊ nˈoʊn ðæt bˈiː. baɪnˈoʊɾæɾəs sˈɛnsuː stɹˈɪktoʊ ɪz ɹᵻstɹˈɪktᵻd tə ðɪ ˈaɪlənd ʌv dʒˈɑːvə ɪn ɪndoʊnˈiːʒə.
The species was previously thought to have a much wider native range in Southeast Asia, but it is now known that B. binotatus sensu stricto is restricted to the island of Java in Indonesia.