Ko te mahi a ngā roera ara he tohatoha i te taumaha o te kerikeri ki te whenua. Ina mahi te kerikeri i runga i te whenua kāore i te ōrite, he nui te pānga ki ngā roera ara. Nō reira, he nui te tautoko a ngā roera ara. Heoi anō, ki te kore e pai te kounga, ā, he maha ngā wā he puehu, me tino pai ngā hiri hei ārai i te paru, te onepu me te wai kei pakaru.
