The African ostrich is the world's tallest living bird; where does the second tallest, the emu, come from?
Common ostrich The ostrich or common ostrich ("Struthio camelus") is either one or two species of large flightless birds native to Africa, the only living member(s) of the genus "Struthio", which is in the ratite family. In 2014, the Somali ostrich ("Struthio molybdophanes") was recognized as a distinct species.
Moa The moa were nine species (in six genera) of flightless birds endemic to New Zealand. The two largest species, "Dinornis robustus" and "Dinornis novaezelandiae", reached about 3.6 m in height with neck outstretched, and weighed about 230 kg . When Polynesians settled New Zealand around 1280 CE, the moa population was about 58,000.