Ko ngā peera roera ngira he peera me ngā roera porotaka he iti te whānui e pā ana ki tōna roa. Ko te kōtaha roera/ara tere kua whakarerekētia ka ārai i ngā tihi ahotea hei whakaroa i te roa o te ratonga peera. He maha ngā hoahoa, ngā raupapa me ngā rahi rerekē o ngā peera roera ngira, e tika ai mō ngā momo tikanga mahi me ngā tono.
