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.
Koalas are highly specialized to survive only in one type of habitat; in woodland with plenty of eucalyptus trees, also known as gum trees. Places like that provide the koala with food, water, safety from ground predators, and all other needs. Koalas do not have dens, tree- holes, or nests. They sleep, eat, and breed on the branches. Unlike most mammals, koalas never make dens or permanent homes. They do have home territories, but they will not stay in one particular tree. The koala is an arboreal animal. Arboreal means âliving in treesâ. Koalas live, eat, and sleep in the top branches of eucalyptus trees, also known as gum trees.