Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Acacia filicifolia, known colloquially as fern-leaved wattle, is a species of native to eastern . On 1 January 1901, the six colonies , forming the Commonwealth of Australia. Since Federation, Australia has maintained a stable political system which functions as a and . The federation comprises . The population of 22.7 million is heavily concentrated in the and is highly . A highly , Australia is the and has the world's . Australia's military expenditure is the . With the , Australia ranks highly in many international comparisons of national performance, such as quality of life, health, education, , and the protection of and political rights. Australia is a member of the , , , , , , , and the .