Ibirango bitandukanye na moderi bifite imikorere itandukanye.
1. Bimwe byahujwe n'amatara yibicu, kandi igifuniko cyamatara yibicu ni ugushushanya gusa.
2. Ibirango bimwe byamatara yibicu bihujwe nibigize ibinyabiziga bitwikiriye itara.Hano hari igifuniko cyamatara yatwikiriye inyuma yigitwikiro cyamatara.
Itara ry'igihu ryashyizwe imbere yimodoka, munsi gato yigitereko cyamatara, kandi rikoreshwa mukumurikira umuhanda mugihe utwaye mugihe cyimvura nigihu.Bitewe no kugaragara neza muminsi yibicu, umurongo wumushoferi wo kureba ni muto.Itara rishobora kongera intera yiruka, cyane cyane urumuri rwinjira mu itara ryumuhondo rirwanya igihu, rishobora kunoza imitekerereze hagati yumushoferi nabitabiriye umuhanda ukikije, kugirango ibinyabiziga byinjira nabanyamaguru babonane kure.