On a nightly basis they tend to be more active during the first portion of night (roughly the four hours between 8:00p.m. and 12:00a.m.); however, they do not seem to prefer bright or dark nights over the other.
ˌɔn ɐ nˈaɪtli bˈeɪsɪs ðeɪ tˈɛnd təbi mˈoːɹ ˈæktɪv dˈʊɹɹɪŋ ðə fˈɜːst pˈoːɹʃən ʌv nˈaɪt ɹˈʌfli ðə fˈoːɹ ˈaʊɚz bᵻtwˌiːn ˈeɪt:zˈiəɹoʊ zˈiəɹoʊ pˈiː.ˈɛm. ænd twˈɛlv:zˈiəɹoʊ zˈiəɹoʊ ˈeɪ.ˈɛm.; haʊˈɛvɚ, ðeɪ duːnˌɑːt sˈiːm tə pɹɪfˈɜː bɹˈaɪt ɔːɹ dˈɑːɹk nˈaɪts ˌoʊvɚ ðɪ ˈʌðɚ.