Answer:

emus

Answer	Crossword Clue
EMUS	Relatives of ostriches
EMUS	Feathered Outback runners
EMUS	Bevy : quails :: mob : ...

EMUS	Australian avians
EMUS	Creatures whose males barely eat or drink during incubation
EMUS	Their eggs are incubated by males
EMUS	Images on Australia's 50-cent coins
EMUS	Layers of dark green eggs
EMUS	Birds that lay big green eggs
EMUS	Birds on some Australian coins
EMUS	Birds on Australian coins

EMUS	Tridactyl birds
EMUS	Sources of lean meat
EMUS	Outback flock
EMUS	Birds whose eggs are incubated by males
EMUS	Birds with deep drumming calls
EMUS	Pride : lions :: mob : ...
EMUS	Big birds
EMUS	Cousins of ostriches

EMUS	Outback runners
EMUS	Birds with inflatable neck sacs
EMUS	Three-toed runners
EMUS	Down Under runners
EMUS	Grounded birds
EMUS	Birds appearing on Australia's 50 cent coins
EMUS	Certain bird herd
EMUS	Dingo prey

EMUS	Winged runners
EMUS	Outback sprinters
EMUS	Exotic avian pets
EMUS	Green-egg layers
EMUS	Flightless flock
EMUS	Skinny-legged trotters
EMUS	Aussie runners
EMUS	Down Under birds

EMUS	Some farm stock
EMUS	Outback avians
EMUS	Birds that can sprint at 30 m.p.h.
EMUS	Layers of eggs weighing more than a pound
EMUS	Birds as big as people