| Squirrel glider | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Infraclass: | Marsupialia |
| Order: | Diprotodontia |
| Family: | Petauridae |
| Genus: | Petaurus |
| Species: | P. norfolcensis |
| Binomial name | |
| Petaurus norfolcensis (Kerr, 1792) | |
 | |
| distribution | |
The squirrel glider (Petaurus norfolcensis) is a nocturnal gliding possum. [2] The squirrel glider is one of the wrist-winged gliders of the genus Petaurus . [3]
This species' home range extends from Bordertown near the South Australian/Victorian Border through south-eastern Australia to northern Queensland. This species was thought to be extinct in South Australia since 1939 until a genetic test confirmed their inhabitance in this area. [4]
The squirrel glider lives in south-eastern Australia in the dry sclerophyll forest and woodlands. In Queensland, however, they occupy a wetter eucalypt forest. [4]
The glider will make a den in the hollow tree and line it with leaves. Here it will sleep and usually lives in groups of one male, 2 females, and offspring. [5]
Like most of the wrist-winged gliders, the squirrel glider is endemic to Australia. It is about twice the size of the related sugar glider (P. breviceps). Its body is 18–23 cm long and its tail measures at 22–33 cm long. [4] It weighs about 230g or 0.5 lbs. [5] They have blue-grey or brown-grey fur on their back and a white belly. The end of their tail is black and they have a black stripe from their eyes to the mid-back. [4] They have a flying membrane that extends from their 5th front toe to the back of their foot on both sides. When they glide their prehensile tail can act as a rudder, allowing them to steer which direction they want to go. [6] They can glide up to 50m from tree to tree. [5] They tend not to glide in captivity.
The breeding season is between June and January. The gestation/pregnancy of a female is 18 days. [6] The litter sizes are usually one to two offspring a year. [5] The offspring will immediately crawl to the mother's marsupium and anchor itself to a teat where it will stay for about 3 months. [6] [7] The mother will wean off her offspring around 4 months while they stay in the den. The offspring become independent at 10 months and go off on their own. The life expectancy is 4–6 years. [5]
The squirrel glider eats mostly fruit and insects. [8] [9] It also feeds on tree sap, mainly eucalyptus or red bloodwood trees. In order to get the sap the squirrel glider will pierce the trunk of the tree causing sap to flow out of it. It also eats pollen, nectar, leaves, and bark. [5] [10]
Natural predators of the squirrel glider include owls and introduced predators include dogs, cats and foxes. Habitat fragmentation and destruction by human agency is also impacting individual populations. However, due to large population sizes and occurrence in several protected areas, the species is currently classified as Least Concern (i.e. not yet threatened) by the IUCN. [1]
The squirrel glider's closest relatives come from the same genus, Petaurus, and they include the sugar glider (P. breviceps), mahogany glider (P. gracilis), northern glider (P. abidi), Biak glider (P. biacensis) and yellow-bellied glider (P. australis). It is not yet known which species the gliders diverged from. The squirrel glider most likely evolved from a marsupial like a possum that had membranes for gliding. Other animals that have this same ancestor include Striped possum and Leadbeaters possum.
Squirrel gliders are often mistaken for flying squirrels of North America. These two species are not related at all. The flying squirrel is a placental mammal and the squirrel glider is a marsupial like koalas and kangaroos. Both have an adaptation for tree living – Patagia. This is the skin that extends from their front to hind legs allowing them to glide between the trees avoiding predators they might come into contact with on the ground. Because these animals are distantly related we call these characteristics analogous.
Squirrel gliders are able to curl their tails around branches to hold on. This feature is homologous to the ring tail possum (order of Diprodontia) which use their tail as an extra limb to grab hold of trees. It is longer but the squirrel gliders tail is bushier.
The sugar glider is a small, omnivorous, arboreal, and nocturnal gliding possum. The common name refers to its predilection for sugary foods such as sap and nectar and its ability to glide through the air, much like a flying squirrel. They have very similar habits and appearance to the flying squirrel, despite not being closely related—an example of convergent evolution. The scientific name, Petaurus breviceps, translates from Latin as "short-headed rope-dancer", a reference to their canopy acrobatics.
Phalangeriformes is a paraphyletic suborder of about 70 species of small to medium-sized arboreal marsupials native to Australia, New Guinea, and Sulawesi. The species are commonly known as possums, gliders, and cuscus. The common name "possum" for various Phalangeriformes species derives from the creatures' resemblance to the opossums of the Americas. However, although opossums are also marsupials, Australasian possums are more closely related to other Australasian marsupials such as kangaroos.
The feathertail glider, also known as the pygmy gliding possum, pygmy glider, pygmy phalanger, flying phalanger and flying mouse, is a species of marsupial native to eastern Australia. It is the world's smallest gliding mammal and is named for its long feather-shaped tail.
Petauridae is a family of possums containing 11 species: four species of trioks and striped possum, six species of wrist-winged glider, and Leadbeater's possum, which has only vestigial gliding membranes. Most of the wrist-winged gliders are native to Australia, whereas most of the striped possums to New Guinea, but some members of each group are found on both sides of the Torres Strait. Leadbeater's possum is endemic to Victoria, Australia.
The genus Petaurus contains flying phalangers or wrist-winged gliders, a group of arboreal possums native to Australia, New Guinea, and surrounding islands. There are eight species: the sugar glider, savanna glider, Krefft's glider, squirrel glider, mahogany glider, northern glider, yellow-bellied glider and Biak glider.
A number of animals are capable of aerial locomotion, either by powered flight or by gliding. This trait has appeared by evolution many times, without any single common ancestor. Flight has evolved at least four times in separate animals: insects, pterosaurs, birds, and bats. Gliding has evolved on many more occasions. Usually the development is to aid canopy animals in getting from tree to tree, although there are other possibilities. Gliding, in particular, has evolved among rainforest animals, especially in the rainforests in Asia where the trees are tall and widely spaced. Several species of aquatic animals, and a few amphibians and reptiles have also evolved this gliding flight ability, typically as a means of evading predators.
There are many different types of gliding possum, sometimes referred to as volplane possum, flying phalangers, or simply as gliders:
Glider or Gliders may refer to:
The mahogany glider is an endangered gliding possum native to a small region of coastal Queensland in Australia.
The striped possum or common striped possum is a member of the marsupial family Petauridae. It is found mainly in New Guinea. The species is black with three white stripes running head to tail, and its head has white stripes that form a 'Y' shape. It is closely related to the sugar glider, and is similar in appearance.
The yellow-bellied glider, also known as the fluffy glider, is an arboreal and nocturnal gliding possum that lives in native eucalypt forests in eastern Australia, from northern Queensland south to Victoria.
The greater gliders are three species of large gliding marsupials in the genus Petauroides, all of which are found in eastern Australia. Until 2020 they were considered to be one species, Petauroides volans. In 2020 morphological and genetic differences, obtained using diversity arrays technology, showed there were three species subsumed under this one name. The two new species were named Petauroides armillatus and Petauroides minor.
The northern glider is a species of marsupial in the family Petauridae. It is endemic to Papua New Guinea, becoming known to science in 1981 after being discovered in the Torricelli Mountains. This species has been found in primary, mid-montane tropical moist forests. It is also known from rural gardens close to forest. The northern glider is Critically Endangered because its occurrence is less than 100 km2, all individuals are located within a single area, and a continuing decline of its habitat quality due to deforestation and human encroachment. They also face a major threat from hunting.
The red and white giant flying squirrel is a species of rodent in the family Sciuridae. It is a very large, dark rufous-red, buff and white flying squirrel found in forests at altitudes of 800–3,500 m (2,600–11,500 ft) in mainland China and 1,200–3,750 m (3,940–12,300 ft) in Taiwan, although the population of the latter island is distinctive and likely better regarded as a separate species, the Taiwan giant flying squirrel. Additionally, the red and white giant flying squirrel possibly ranges into northeastern South Asia and far northern Mainland Southeast Asia. This squirrel has a wide range and is relatively common, and the International Union for Conservation of Nature lists it as being of "least concern".
Petauroidea is a superfamily of marsupials from Australia and New Guinea. It is part of the suborder Phalangeriformes within the order Diprotodontia, which also includes, among others, wombats, kangaroos, cuscuses. The superfamily Phalangeroidea, including cuscuses and brushtail possums and pygmy possums, is the immediate sister group of the Petauroidea. The earliest fossils from this superfamily are from the Oligocene of the Geilston Bay fossil site in Tasmania.
The savanna glider is a species of arboreal gliding possum in the genus Petaurus.
Krefft's glider is a species of arboreal nocturnal gliding possum, a type of small marsupial. It is native to most of eastern mainland Australia and has been introduced to Tasmania. Populations of Petaurus from New Guinea and Indonesia previously classified under P. breviceps are also tentatively classified under P. notatus by the American Society of Mammalogists, but likely represent a complex of distinct species. As most captive gliders referred to as "sugar gliders" in at least the United States are thought to originate from West Papua, this likely makes them Krefft's gliders, at least tentatively.
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