Noun: flightless bird flIt-lus burd
- Flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches, cassowaries, emus, moas, rheas, kiwis, elephant birds
"flightless birds have evolved to be powerful runners instead of flyers";
- ratite, ratite bird
Derived forms: flightless birds
Type of: bird, birdie [informal]
Encyclopedia: Flightless bird