stˈʌdiz sədʒˈɛst ðætðə fˈiːmeɪlz dˈuː sˌoʊ baɪ lˈʊkɪŋ fɚðɪ ˌʊltɹɐvˈaɪəlɪt ɹᵻflˈɛktəns pˈætɚn ɔnðə dˈoːɹsəl wˈɪŋ sˈɜːfɪs ʌv sˈiː. jˈuːɹɪθˌiːm mˈeɪlz.
Studies suggest that the females do so by looking for the ultraviolet reflectance pattern on the dorsal wing surface of C. eurytheme males.