rhea: larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia
ratite: flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
grass poly: annual with small solitary pink flowers; originally of Europe but widely naturalized in moist areas