From the ostrich to the penguin and from the rhea to the emu, here is a look at some of the world's more exotic flightless birds. Ostrich The world’s largest bird, the ostrich is surprisingly ...

Wing bones are greatly reduced in ostrich and rhea and completely absent in moa. Ostrich, rhea and moa also have sternums with no keel, a hallmark of flightless birds.  Advanced Search ...