Rhea_americanaWordNet Explorer

larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia

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

type genus of the Rheidae; large tall flightless South American birds similar to but smaller than ostriches