n.flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds

同義詞：ratite birdflightless bird

Ratites and tinamous
The evolution of ratites
Comparative Clinical Anatomy of Ratites
The mating systems of ratites and tinamous: an evolutionary perspective
New information on the eggshell of ratites (Aves) and its phylogenetic implications
Evolutionary relationships of ratites and carinates: evidence from ontogeny of the tarsus
McGowan, C. Evolutionary relationships of ratites and carinates: evidence from ontogeny of the tarsus. Nature
Periosteal bone growth rates in extant ratites (ostriche and emu). Implications for assessing growth in dinosaurs.
Subtypes of Avian Influenza Virus Isolated from Exotic Birds and Ratites in the United States, 1992-1996
Tinamous and moa flock together: mitochondrial genome sequence analysis reveals independent losses of flight among ratites