Sugar gliders occupy a broad arc of forested land across eastern, northern, and parts of inland Australia, from the rainforests of far north Queensland down through New South Wales and Victoria. They thrive wherever they can find wooded habitat with enough tree hollows for shelter and enough flowering or sap-producing trees to eat from, which means their range covers a surprisingly wide swath of the continent. The story has grown more complicated in recent years, though, because what scientists once called a single species has been split into three, each with its own geographic footprint.
The Eastern Seaboard and Its Forests
The densest populations of sugar gliders sit along Australia’s eastern coast. Coastal New South Wales and south-eastern Queensland are home to a genetically distinct lineage that researchers identified through mitochondrial DNA analysis, setting it apart from gliders found elsewhere in the country.1Australian Journal of Zoology. Phylogeography of the Australian sugar glider (Petaurus breviceps): evidence for a new divergent lineage in eastern Australia This eastern population lives in a landscape of tall eucalyptus forest, wet sclerophyll woodland, and patches of subtropical rainforest. Fieldwork in New South Wales has captured sugar gliders in nature reserves and national parks scattered across the region, from Imbota Nature Reserve near Armidale to sites around Dorrigo in the hinterland.2iScience. Contrasting physiological responses to habitat degradation in two arboreal mammals
Moving south, the range extends into Victoria, where sugar gliders are found in a mix of foothill forests and lowland woodland. One survey in south-eastern Australia found sugar gliders present on 29 of 32 transects in a study landscape, giving a naïve occupancy rate of 0.84. That is an unusually high detection rate for a small nocturnal mammal and suggests these gliders are anything but rare in suitable habitat.3Forest Ecology and Management. General or local habitat preferences? Unravelling geographically consistent patterns of habitat preference in gliding mammals South Australia rounds out the eastern and southern distribution, though populations there tend to be patchier and associated with drier woodland.
Northern and Inland Australia
Beyond the east coast, sugar gliders (in the broad, traditional sense) range across much of northern Australia, from the tropical savannas of the Top End through parts of the Kimberley region of Western Australia and across into the woodlands of inland Queensland. These populations were historically lumped together under the same species name, but they look and behave differently from their coastal relatives. Inland gliders tend to be lighter in colour, smaller in body mass in some regions, and adapted to a harsher, more seasonal climate with unpredictable rainfall.
Research on gliders in the inland and northern part of this range has revealed dramatic differences in how they use space. In high-rainfall tropical forest, individual home ranges averaged around 2.5 hectares. In low-rainfall woodland, the same species maintained home ranges averaging about 23 hectares, a nearly tenfold increase. Body mass and population density shifted accordingly: gliders in the low-rainfall area weighed more on average (about 101 grams versus 68 grams) but lived at far lower densities, roughly 0.2 individuals per hectare compared with 1.1 in the wetter habitat.4Journal of Zoology. Resource availability drives variation in a marsupial glider’s home‐range size The explanation is straightforward: when food is spread thinly across dry, open woodland, each glider needs a much bigger territory to survive.
A Species Split That Redrew the Map
For decades, every sugar glider in Australia was classified as Petaurus breviceps. That changed in 2020 when genetic and morphological work led to three Australian species being recognised where there had been one. Two of the newly elevated species, Petaurus notatus (sometimes called Krefft’s glider) and Petaurus ariel (the savanna glider), now have their own described geographic ranges across the continent. The name P. breviceps in the strict sense has been retained primarily for a population in north-eastern Queensland that still needs formal revision.5PubMed Central. Comparative Analysis of Petaurus Cryptic Species of ‘Sugar Glider’ from Australia and New Guinea Using 3D Geometric Morphometrics
This matters for the “where do they live” question because the three species occupy different parts of the country. P. notatus is broadly the south-eastern species, found through Victoria, southern New South Wales, and into South Australia. P. ariel inhabits the northern savannas and drier inland areas. P. breviceps sensu stricto sits in the wet tropics of north-eastern Queensland. Earlier genetic work had already flagged this pattern, identifying two deeply divergent mitochondrial DNA lineages whose geographic boundaries did not match the old subspecies classifications.1Australian Journal of Zoology. Phylogeography of the Australian sugar glider (Petaurus breviceps): evidence for a new divergent lineage in eastern Australia The split means that when people talk about “sugar gliders” in Australia, they may be talking about any of these three species depending on where exactly they are looking.
For most practical purposes, all three species are still casually referred to as sugar gliders, and their combined Australian range remains the same large arc it always was. But conservation planning, wildlife management, and ecological research now need to treat them separately, because each species has its own population dynamics, habitat needs, and vulnerabilities.
What Kind of Habitat They Need
Sugar gliders are not picky about the exact species of tree around them, but they are demanding about the structure of the forest. They need connected canopy, because gliding between trees is their primary mode of transport. Fieldwork in tropical Queensland found that sugar gliders were most strongly associated with dense mid- and upper-canopy cover, a large number of potential food species, and certain tree species including Corymbia intermedia and Acacia mangium, along with the presence of rainforest species in the mix.6Wildlife Research. Habitat relationships of the mahogany glider, Petaurus gracilis, and the sugar glider, Petaurus breviceps In south-eastern Australia, the best predictor of sugar glider presence was the basal area of winter-flowering trees, which provide nectar and pollen through the cold months when other food sources are scarce.3Forest Ecology and Management. General or local habitat preferences? Unravelling geographically consistent patterns of habitat preference in gliding mammals
Their diet is diverse but centers on sweet, energy-rich foods. Nectar, pollen, tree sap, and the sugary exudates that give them their common name make up the bulk of what they eat, supplemented by insects and other arthropods for protein. Fruit rounds out the menu seasonally. This flexible diet is one reason they can occupy such a wide range of Australian habitats, from lush coastal rainforest margins to dry inland woodland, as long as there are enough flowering trees to keep them fed through the year.
Tree Hollows as a Limiting Factor
If food determines where sugar gliders can forage, tree hollows determine where they can live. Sugar gliders are obligate hollow-dwellers: they sleep in tree cavities during the day, often in groups, and females raise their young inside them. Without hollows, a patch of otherwise suitable forest is essentially uninhabitable. Early research comparing sugar gliders and squirrel gliders at the same sites concluded that sugar glider numbers may have been limited by a lack of suitable hollows, even when food resources appeared adequate.7Australian Mammalogy. Use of Tree Hollows by Two Sympatric Gliding Possums, The Squirrel Glider, Petaurus norfolcensis and The Sugar Glider, P. breviceps
Hollows large enough for a sugar glider colony take decades to form naturally in a living eucalyptus tree, and centuries in some species. When forests are logged, the oldest trees with the best hollows are usually the first to go. This creates a bottleneck that can persist for generations of trees even after logging stops. Studies in fragmented forest reserves have investigated which den attributes sugar gliders prefer, looking at both natural hollows and artificial nest boxes, because understanding those preferences is critical for designing effective restoration efforts.8Forest Ecology and Management. One size does not fit all: Intra– and interspecific variation of den site use in two marsupial glider species in fragmented forest The findings suggest that a one-size-fits-all approach to nest box design does not work well; both sugar gliders and squirrel gliders show variation in what they will accept, meaning conservation programs need to offer a range of options.
Tasmania, Where Sugar Gliders Are Not Supposed to Be
Sugar gliders are native to mainland Australia, but they also live in Tasmania, where they are an introduced species. They were probably brought to the island in the 1800s, though the exact timeline is murky. What is not murky is the damage they have caused since arriving. Sugar gliders are now widespread across Tasmanian forests and have become the primary predator of the critically endangered swift parrot, a migratory bird that breeds in Tasmania’s eucalyptus woodlands. Surveys have found sugar gliders distributed broadly across logged Tasmanian forest, raising the concern that predation risk for small cavity-nesting birds is high across much of the swift parrot’s breeding range.9Austral Ecology. Occupancy patterns of the introduced, predatory sugar glider in Tasmanian forests
This is one of those situations where the same animal can be a valued native species on the mainland and an invasive threat on an island just a few hundred kilometres away. The swift parrot evolved without mammalian nest predators, so it has no behavioral defenses against gliders raiding its hollows. Sugar gliders eat the eggs, chicks, and sometimes the incubating adults. The problem is compounded by logging, which reduces the number of large old trees with hollows and forces both parrots and gliders to compete for the remaining den sites. Managing sugar gliders in Tasmania is a genuine conservation dilemma: you cannot simply remove them from an entire island, but leaving them unchecked puts one of Australia’s rarest birds at serious risk.
Living in Fragmented and Cleared Landscapes
Across much of eastern Australia, the forests sugar gliders depend on have been cleared, thinned, or broken into isolated patches by agriculture and urban development. Sugar gliders can persist in surprisingly small remnants if those patches retain enough mature trees with hollows and enough food plants, but connectivity between patches matters enormously. Gliders can cross short open gaps by gliding, but wide cleared areas with no launch or landing trees are effectively impassable. Populations trapped in isolated fragments become vulnerable to local extinction from bushfire, drought, or simply demographic bad luck in small numbers.
Nest box programs have been deployed in fragmented landscapes to compensate for the shortage of natural hollows. Research on squirrel gliders, a close relative with similar hollow requirements, found that well-designed nest boxes were used continuously for over a decade at some sites, with individual gliders occupying the same box for up to seven years.10Restoration Ecology. Specific nest box designs can improve habitat restoration for cavity‐dependent arboreal mammals Sugar gliders have been shown to use nest boxes as well, though occupancy rates vary depending on box design, placement, and what else is available in the area. The takeaway from this work is that artificial hollows can genuinely help sustain populations in degraded habitat, but they are a supplement to, not a substitute for, retaining old trees.
Places You Will Not Find Them
Sugar gliders are absent from several large chunks of Australia, and the reasons are fairly intuitive. The arid interior of the continent, including most of central and western Australia, is too dry and too sparsely treed. Sugar gliders need continuous or near-continuous canopy to move through their habitat, and the open spinifex grasslands and shrublands of the red center simply do not provide that. They also need a reliable supply of nectar, sap, and insects year-round, which the deep interior cannot offer.
The treeless plains of western New South Wales and western Queensland mark the inland boundary of their range on the eastern side. In the north, they extend across the Top End and parts of the Kimberley, but peter out where tropical woodland transitions to arid scrub. They do not occur naturally on any offshore islands besides those they could reach when sea levels were lower during glacial periods. Their absence from Tasmania until human introduction confirms that Bass Strait was a barrier they could not cross on their own.
In Western Australia, the situation is particularly interesting. Sugar gliders (in the broad sense, now including P. ariel) reach the Kimberley region in the far north, but the vast deserts separating the Kimberley from the forests of the south-west corner of the state mean there are no sugar gliders in the eucalyptus forests around Perth or in the tall karri and jarrah forests of the south-west. Those forests support other glider species, but not sugar gliders.
How Fire and Logging Reshape Their Range
Bushfire is a natural part of the Australian landscape, and sugar gliders have coexisted with it for millions of years. Moderate fire can actually benefit them by promoting the regrowth of flowering shrubs and stimulating sap flow in certain eucalyptus species. But high-intensity fires that kill mature hollow-bearing trees are devastating, because those trees take the longest to replace. After the catastrophic 2019-2020 bushfire season, which burned through large tracts of sugar glider habitat in New South Wales and Victoria, there was real concern about how quickly populations in the worst-hit areas could recover.
Logging presents a more chronic threat. Selective logging often targets the largest, oldest trees, which are exactly the ones most likely to contain hollows. Even where logging is followed by regeneration, the new forest may take 100 to 200 years to develop hollows comparable to what was removed. In Tasmania, the interaction between logging and sugar glider presence is especially perverse: logging creates the degraded forest structure that sugar gliders exploit for nesting, while simultaneously reducing the number of hollows available to swift parrots.9Austral Ecology. Occupancy patterns of the introduced, predatory sugar glider in Tasmanian forests The result is a landscape where a native-elsewhere invasive thrives at the expense of a critically endangered native bird.
Sugar Gliders Beyond Australia
Australia is only part of the sugar glider’s natural range. Populations also occur across much of New Guinea, including both the Indonesian province of Papua and Papua New Guinea, as well as on some of the islands in the Bismarck Archipelago. The New Guinean populations were traditionally grouped under P. breviceps alongside the Australian ones, and genetic work has confirmed considerable morphological and DNA diversity across this broader range.1Australian Journal of Zoology. Phylogeography of the Australian sugar glider (Petaurus breviceps): evidence for a new divergent lineage in eastern Australia The 2020 taxonomic revision that split Australian sugar gliders into three species did not resolve the status of all New Guinean populations, and further work using skull shape analysis has continued to compare cryptic species from both regions.5PubMed Central. Comparative Analysis of Petaurus Cryptic Species of ‘Sugar Glider’ from Australia and New Guinea Using 3D Geometric Morphometrics
Sugar gliders have also been introduced to places well outside their natural range. Besides Tasmania, feral populations have established in parts of Indonesia outside their native distribution. And of course, sugar gliders are widely kept as exotic pets in North America, Europe, and parts of Asia, though those captive animals are an entirely different story from wild populations. The pet trade historically drew from Australian and New Guinean stock, but captive breeding now supplies most of the demand. Wild Australian sugar gliders are protected and cannot be legally exported.
Why the Range Question Keeps Getting More Complicated
Before the species split, you could answer the question of where sugar gliders live with a simple map showing a single coloured blob across eastern, northern, and parts of western Australia. That map was accurate enough for casual purposes but masked the real biological picture. Now that three species are recognised, each with its own evolutionary history and ecological requirements, the range question has become three questions. P. notatus in the south-east occupies a relatively stable, well-studied range in some of Australia’s most productive forests. P. ariel in the north and inland faces a more challenging existence in drier, more fire-prone habitats where resource availability swings wildly between wet and dry seasons.4Journal of Zoology. Resource availability drives variation in a marsupial glider’s home‐range size P. breviceps in the strict sense occupies the smallest and least-studied range in the wet tropics.
Conservation biologists have argued that the two deeply divergent evolutionary lineages identified through genetic work should be treated as separate management units, regardless of whether they receive formal species status.1Australian Journal of Zoology. Phylogeography of the Australian sugar glider (Petaurus breviceps): evidence for a new divergent lineage in eastern Australia That recommendation predated the formal three-way split and has only become more urgent since. Managing a species effectively requires knowing what it is, where it is, and how its populations connect, and for Australian sugar gliders all three of those questions are still being refined.