Engari ko ētahi e āta tiaki ana i tēnei huarahi, e whakaaro ana "te utunga tāke" me te tohu i te tirohanga hāngai hei "taxonomic conservatism”; e mōhio ana he pai ki te whakawehe i ngā momo me te mōhio ki ngā iwi whāiti ake i te taumata momo, nā te mea ko te tikanga o tēnei ka māmā te whakauru atu ki te rārangi whero IUCN, ā, ka āhei rātou ki te kawe mai i ngā ture atawhai me te pūteatanga."