| 单词 | ratite bird |
| 释义 | ratite bird (once / 11819311 pages) n WORD FAMILY ratite bird n flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds Syn|Ant|Hypo|Hyper flightless bird, ratite carinate, carinate bird, flying bird birds having keeled breastbones for attachment of flight muscles Struthio camelus, ostrich fast-running African flightless bird with two-toed feet; largest living bird cassowarylarge black flightless bird of Australia and New Guinea having a horny head crest Dromaius novaehollandiae, Emu novaehollandiae, emularge Australian flightless bird similar to the ostrich but smaller apteryx, kiwinocturnal flightless bird of New Zealand having a long neck and stout legs; only surviving representative of the order Apterygiformes Rhea americana, rhealarger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia Pterocnemia pennata, nandu, rheasmaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan aepyornis, elephant birdhuge (to 9 ft.) extinct flightless bird of Madagascar moaextinct flightless bird of New Zealand Dinornis giganteus, giant moathe largest moa; about 12 feet high Anomalopteryx oweni, anomalopteryxthe smallest moa; slender moa about the size of a large turkey bird warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings |
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