1. (noun) smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan

• nandu
• pterocnemia pennata

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

• rhea americana

1. (noun) smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan

• flightless bird
• ratite
• ratite bird

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

• flightless bird
• ratite
• ratite bird

1. (noun) smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan

• genus pterocnemia
• pterocnemia

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

• genus rhea