Answer:

moas

Answer	Crossword Clue
MOAS	Kiwi's extinct cousins
MOAS	Extinct birds
MOAS	Extinct New Zealand flock

MOAS	Birds displayed in the Auckland Museum
MOAS	Extinct New Zealand birds
MOAS	Extinct kiwi relatives
MOAS	Extinct New Zealanders
MOAS	Extinct cousins of the ostrich
MOAS	Flightless birds
MOAS	Extinct birds of New Zealand
MOAS	Birds that ranged in size from turkey to ostrich.

MOAS	Kin of the kiwi.
MOAS	Extinct flightless birds.
MOAS	Extinct ratites.
MOAS	Extinct birds.
MOAS	They're extinct as the dodoes.
MOAS	They're extinct.
MOAS	Ancestors of the ostrich.
MOAS	Extinct relatives of the kiwis.

MOAS	Long-gone birds.
MOAS	Certain birds.
MOAS	Old birds.
MOAS	Big birds
MOAS	Struthious birds
MOAS	Large birds
MOAS	Ostriches' relatives
MOAS	Bygone birds

MOAS	Extinct flightless birds
MOAS	Extinct N.Z. birds
MOAS	Flightless birds of yore
MOAS	Extinct relatives of ostriches
MOAS	Old New Zealand natives
MOAS	Extinct emu-like birds
MOAS	Extinct ostrich relatives
MOAS	Cousins of the ostrich

MOAS	Bygone big birds
MOAS	Some extinct birds
MOAS	Extinct ostrichlike birds
MOAS	Flightless birds of New Zealand
MOAS	Large extinct birds