Kiwis

• Emus
• Elephant birds
• The kiwi is the smallest one
• The emu, for one
• Cassowary or ostrich
• Flightless birds having flat breastbones lacking a keel for attachment of flight muscles ostriches

Wikipedia Word definitions in Wikipedia
A ratite is any of a diverse group of large, flightless birds of the infraclass Palaeognathae . The systematics involved have been in flux. Some sources state that ratites include all the flightless birds of the Palaeognathae; previously, all these birds ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ratite \Rat"ite\ (r[a^]t"[imac]t), a. (Zo["o]l.) Of or pertaining to the Ratit[ae]. -- n. One of the Ratit[ae].

WordNet Word definitions in WordNet
n. flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds [syn: ratite bird , flightless bird ] [ant: carinate ]