ɪn tˈɜːmz ʌv mˈeɪɾɪŋ ˌʌndɚ nˈætʃɚɹəl kəndˈɪʃənz, ðə mˈeɪlz duːnˌɑːt dɪskɹˈɪmᵻnˌeɪt bᵻtwˌiːn ðə spˈiːsiːz, bˌʌt fˈiːmeɪlz meɪntˈeɪn nˌɪɹli kəmplˈiːt ɹᵻpɹədˈʌktɪv ˌaɪsəlˈeɪʃən.
In terms of mating under natural conditions, the males do not discriminate between the species, but females maintain nearly complete reproductive isolation.