It depends on what is meant by "biggest", and whether this refers to height or weight.
The emu is Australia's tallest bird, averaging 1.6 to 2 metres in height. Its nearest rival is the Southern Cassowary which averages 1.5 to 2 metres. Next to the emu, it looks distinctly shorter and stockier.
The Southern Cassowary, however, tends to be heavier. Emus range between 30 and 45kg in weight, whilst the Southern Cassowary averages 38 - 48kg.
The biggest cockatoo is Australia is the Black Palm Cockatoo, which inhabits the far norther tip of Cape York. It can reach 55-60 cm in length.
the eagle
A black cockatoo is any of various species of Australian cockatoo of the genus Calyptothycus with mainly black plumage, sometimes also called the great black cockatoo.
The cockatoo is an Australian bird. It was unknown to the ancient Chinese and had no part in their folklore.
The state animal of the Australian Capital Territory is the Gang Gang Cockatoo, gray and red cockatoo found in the higher altitude old growth eucalypt forests.
The faunal emblem for the Australian Capital Territory is the gang gang cockatoo.
The faunal emblem of the Australian Capital Territory is the Gang Gang Cockatoo.
The corella (Little Corella and Long-billed Corella) is a white cockatoo with pinkisj-red cheek feathers.
The corella is mostly white, with a pinkish face.
a lot of them fit this description but i think your talking about the sulphur crested cockatoo if its white or the palm cockatoo if its black
These are all types of Australian native birds.
The faunal emblem of the ACT is the gang-gang cockatoo.
Cockatoos are native Australian birds.Species unique to Australia include:galahcorellagang gang cockatoored tailed black cockatooyellow tailed black cockatoosulphur crested cockatoo
A flock'a'tiels. A group of cockatiels is simply known as a flock.