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Koalas
Native to Australia and exclusive to the eucalypt forests of Eastern and South-Eastern Australia, there are only three subspecies of Koala. Solitary animals, Koalas sleep as long as long as 18 hours a day and have a low-energy diet of eucalyptus leaves.
1,608 Questions
How are koala body parts used for survial?
Body structures that help a koala survive include:
- Koalas have very strong claws suitable for gripping trees and climbing. Between their first and second "fingers" is a large gap, which enables them to also grip tree branches comfortably, whilst their hind legs have one toe set at a wide angle. They also have toes with thick pads which enable them to sit comfortably in a tree all day.
- As with all marsupials, the koala has a pouch, where the joey stays after birth for up to ten months. When the joey leaves the pouch, it stays for several more months on the back of their mother. The pouch opens backwards. After about 30 weeks, the mother produces a substance called pap. This substance is actually a specialised form of the mother's droppings which, having passed through her digestive system, give the joey the enzymes it needs to be able to start digesting the tough gum leaves, making an easier transition for the baby koala to start eating eucalyptus leaves.
- Koalas in southern regions have thick, wool-like waterproof fur to keep them warm in cold weather and dry in rain. Koalas in northern regions are smaller, with less dense fur.
How are koalas adapted for life in the tree?
Koalas have very strong claws suitable for gripping trees and climbing. The shape and design of their fingers enables them to act like opposable thumbs. Between their first and second "fingers" is a large gap, which enables them to also grip tree branches comfortably, whilst their hind legs have one toe set at a wide angle. They also have toes with thick pads which enable them to sit comfortably in a tree all day.
What is the appearance of the koala bears?
Koalas are not bears. There is no such creature as a koala bear.
Koalas have woolly light to dark grey fur with brown and white patches and a cream belly. They have a broad head with small eyes, large furry ears and a distinctive large oval-shaped black nose. The female has two teats and a rear opening pouch. Southern koalas are darker in colour than their northern counterparts. Koalas have very strong, sharp claws for tree climbing.
Koalas in northern parts are smaller, with males growing to 740 mm and weighing 9 kg, and females growing to 720 mm and weighing 7.25 kg.
Southern koalas have longer fur, particularly noticeable in the longer ear-tufts, and are larger. The males can grow to 820 mm and 15 kg whilst females can grow to 730 mm and 11 kg.
The fur of a koala is usually either grey (phascolarctos cinereus adustus and phascolarctos cinereus victor) or greyish brown (phascolarctos cinereus cinereus). Mature males can have a brownish stain on their chest, the result of their scent gland.
Koalas are essentially solitary animals, but they live in communities where the social structure is quite complex. Koalas are territorial, but each koala within the social group has its own specific range for feeding, which may or may not overlap the range of its neighbour. There is always one dominant male in each social group, but he is by no means the only male.
Koalas do feed alone and travel alone, but they understand their own social structure. When one of their community dies, another does not immediately move in and take its place. It takes about a year for the scent of the previous occupant to fade, and only then will another koala move in to its range.
How many koalas are in a community of koalas?
Although koalas are solitary animals, they live in structured communities with a dominant male. There is no specific number of koalas in a community, which can overlap with other communities extend across an area of a square kilometre. There may be several dozen koalas within community.
How often do koalas have joeys?
Yes - koalas have joeys once a year, usually during the summer months. And yes - koala young are called joeys, just like other marsupial young.
A kangaroo's tail is very strong. It plays a vital role in balancing the animal, both when it is bounding along, and when it is just walking slowly. A kangaroo will sometimes balance briefly on its tail while it kicks out with its hind legs: this is an effective defence behaviour.
Do koalas compete with other animals for food?
Not usually. Koalas generally have a range of home trees extending up to 1 square kilometre, and these home ranges overlap with those of other koalas. Their only difficulty is when a road or development is built through the centre of their home range, blocking access to the other trees. When this happens, the koala may try to reach its usual trees, or it may find alternatives.
There are several factors contributing to koala deaths each year.
The chief threat to the koala is habitat loss. Koalas inhabit prime land which man has decided is better used for housing developments. Not only do the koalas lose their sources of shelter and food, they are subject to dog attacks and being hit by cars as suburbia extends further outwards. A prime example of this is southeast Queensland, where koala numbers have dropped to 60% less than what they were a decade ago, entirely due to increased development - and where they now face extinction by 2020.
Koalas are territorial, and they live in complex social communities where each member has a certain number of trees within its territory. When access to these trees is cut off by new roads, the koalas will still try to cross the road, and risk being hit. Relocation of koalas is rarely successful because their territorial and social habits are largely misunderstood.
Another significant factor is predation by introduced species such as dogs and foxes.
Koalas are also subject to the disease chlamydia, which affects the koalas' fertility, and eventually leads to their death. Currently, there is no cure for this disease.
What do a kangaroo koala and opossum have in common?
Possums and kangaroos are both warmblooded mammals, specifically, marsupials. Both these creatures give birth to very undeveloped live young which then continue most of their development in the mother's pouch.
Many species of possums and kangaroos are herbivorous, although the smaller species of each are omnivorous, living also on insects and/or insect larvae. (Kangaroo does not refer to just wallabies, Red kangaroos and the Grey kangaroos - there are several small desert-dwelling species of macropod).
How can you prevent the extinction of the koala?
The first thing that you can do to help save the Koala is learn about them. Spread the word to others about the need to help save them. Write letters protesting destruction of their habitat. Do not support companies that invade the Koala habitat.
It is not certain how koalas have come to be infected with Chlamydia. The most recent research has suggested that it originated from amphibians such as frogs.
Adult koalas eat eucalytus leaves. Juveniles or joeys drink only milk at first and then they consume milk and what is called pap. It is a substance produced by the mother that gives the joey the microbes it needs to digest eucalyptus leaves. Joeys consume milk and eucalyptus leaves until they are weaned at about one year old.
Aha... koalas might look cute but they're aggressive, but if you raise a young koala and it is always bonded with humans it can be a friendly mini bear :D
But if you see a wild koala stay away!
What country would kangaroos koala bears and and boomerangs be in?
G'day, mate! They all come from Australia!
How do baby koalas stay on their moms back?
After the young koala grows too big for its mother's pouch, it is still dependent upon its mother for several months, and not able to look after itself in the arboreal habitat in which it lives. It clings to its mother's back for security and while it is still learning how to survive on its own.
Few animals eat the koala. Unsupervised dogs frequently kill koalas, but they do not eat them.
Dingoes will eat koalas, and Birds of Prey may try to take koala joeys. Quolls may even attempt to eat a young joey if it is not secure in its mother's pouch.
What do koalas use their ears for?
Listening for danger and possibly keeping cool in that hot climate
What time of the year are koalas born?
Koalas are nocturnal, meaning they usually come out at night. However, they can certainly be seen during the day as they move between trees in their home range. Early mornings are one of the times they are most active.
How many koalas were there before?
It is not known how many koalas there were in 1900, but at this stage, they were very close to extinction. Demand from the US and the UK for koala fur meant that hunters were decimating these animals, just for their pelts. It was only when the Austalian government brought in legislation to protect the koala that numbs began to rise again.
What behavioral characteristics of the koala help it to survive?
- Kangaroos are able to travel long distances at a high speed, expending very little energy. They are very energy-efficient, and this is linked directly to the physical action of bringing their hind legs up with each hop. Every hop literally refills the lungs. This means they can outrun their enemies.
- Kangaroos have large, strong tendons in their hind legs which act as "springs". The springing motion requires less energy than running does, so kangaroos are able to bound for longer distances than other mammals with the standard four legs can run. They have strong back legs and elongated hind feet for bounding.
How many days after koalas mate is a baby koala born?
On average, female koalas of reproductive age give birth once a year, or once every two years.
