Fun apeere, awon aajo  American Ornithologists Union ko awon Tetraonidae (grouse), Numididae (eye awo), ati Meleagrididae (awon tolotolo) as bii molebi ni ebi Phasianidae.Eto ati atankale Irandiran Phasianidae ni o tobi julo ninu eka Galliformes, ti o si pelu awon eya 150.. 
Àìtó ìyípo urea yìí  máa ń wáyé látàrí àṣìṣe ìbínimọ̀ (àṣìṣe ìbínimọ̀ nínú ara), àti tí ẹ̀dọ̀ bá dáwọ́ iṣẹ́ dúró.. 