noun
ratites
Zoological term for a group of flightless birds including ostriches, emus, kiwis, etc. Used in scientific or educational contexts.
走鳥類にはダチョウやエミューが含まれる。
Ratites include ostriches and emus.
Compound of 走 (running) + 鳥 (bird) + 類 (category), literally 'running-bird category', referring to the group's terrestrial adaptation.