Rhea -- (fertility goddess in ancient Greek mythology; wife of Cronus and mother of Zeus; identified with Roman Ops and Cybele of ancient Asia Minor)
rhea, nandu, Pterocnemia pennata -- (smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan)
rhea, Rhea americana -- (larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia)