What is an ACTH test? Adrenocorticotropic hormone (ACTH) is a hormone produced in the anterior, or front, pituitary gland in the brain. The function of ACTH is to regulate levels of the steroid hormone cortisol, which released from the adrenal gland.
Koalas live in eucalypt woodlands and forests. Home range size varies according to quality of habitat, ranging from less than two hectares to several hundred hectares. Koalas are found between south-eastern South Australia and Queensland, but only where enough suitable trees have been left. The largest koalas weigh over 10 kilograms and are found in Victoria, while the smallest live in North Queensland and weigh only 5.5 kilograms. In NSW, koalas mainly live on the central and north coasts, with some populations west of the Great Dividing Range, on the south coast and on the southern tablelands. Most populations live in isolated habitats and many areas in which koalas are most abundant are subject to intense pressures.
These are areas where koalas are unable to live today, because the climate is too dry. Although we do not know the exact distribution of koalas before the Europeans arrived, we do know that that eucalyptus forests once covered much of eastern Australia.