Feathertail glider

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Feathertail glider [1]
Acrobates neuneu.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Family: Acrobatidae
Genus: Acrobates
Desmarest, 1818
Species:
A. pygmaeus
Binomial name
Acrobates pygmaeus
(Shaw, 1793)
Feathertail Glider IUCN Range.png
Distribution of the feathertail glider
Acrobates pygmaeus Acrobates pygmaeus 2.jpg
Acrobates pygmaeus

The feathertail glider (Acrobates pygmaeus), also known as the pygmy gliding possum, pygmy glider, pygmy phalanger, flying phalanger and flying mouse, [3] 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.

Contents

A second species, the broad-toed feathertail glider (Acrobates (Dromicia) frontalis, De Vis 1887) is recognised by some authors [4] based on unpublished genetic studies and cryptic morphological differences in toe and tail characteristics. With this recognition, it is suggested that Acrobates pygmaeus takes the common name narrow-toed feathertail glider.

Description

At just 6.5–8 cm (2.6–3.1 in) in head-and-body length [5] and weighing about 12 g (3⁄8 oz), the feathertail glider is only around the size of a small mouse, and is the world's smallest gliding mammal. [4] The fur is soft and silky, and is a uniform greyish brown on the upper body, and white on the underside. There are rings of dark fur around the eyes, the rhinarium is hairless and deeply cleft, and the ears are moderately large and rounded. The glider also has an unusually large number of whiskers, sprouting from the snout and cheeks, and from the base of each ear. [4]

Like other gliding mammals, the feathertail glider has a patagium stretching between the fore and hind legs. Only reaching the elbows and knees, this is smaller than that of the petaurid gliding possums, although the presence of a fringe of long hairs increases its effective area. The tail is about the same length as the head and body combined, oval in cross-section, only slightly prehensile, and has very short fur except for two distinctive rows of long, stiff hairs on either side. This gives the tail the appearance of a feather or a double-sided comb. The hindfeet possess enlarged, opposable first digits, which unlike all the other toes on both fore and hind feet, lack claws. [4]

The tongue is long and thin, reaching as much as 11 mm (0.43 in), and has numerous long papillae that give it a brush-like appearance. This improves the animal's ability to collect pollen and consume semi-liquid food. [6] The structure of the ear is also unusual, since the animal possesses a unique bony disc with a narrow crescent-shaped slit just in front of the eardrum. The function of this bone is unclear, but it may act as a Helmholtz resonator and enhance sensitivity to certain frequencies of sound. [7] The brain has been recorded as weighing 360 milligrams (0.013 oz). [4]

The female has two vaginae, which merge into a single sinus before opening into a cloaca together with the rectum. The pouch opens towards the front, as is common in diprotodont marsupials, and contains four teats. [4]

Distribution and habitat

Feathertail gliders are found across the eastern seaboard of continental Australia, from northern Queensland to Victoria and extreme south-eastern South Australia. [2] There are no recognised subspecies. They inhabit a wide range of forest types across the region, from sea level to at least 1,200 m (3,900 ft). [4] Fossils belonging to the genus Acrobates have been identified from deposits in Queensland dating back to 0.5 million years ago, during the late Pleistocene. [8]

Behaviour and biology

Feathertail glider, Acrobates pygmaeus, showing the animal's size and its distinctive tail with a "feathered" appearance Feathertail glider, Acrobates pygmaeus (Tony Rees photograph).jpg
Feathertail glider, Acrobates pygmaeus, showing the animal's size and its distinctive tail with a "feathered" appearance

Feathertail gliders are omnivorous, feeding on nectar, pollen, and arthropods such as moths, ants, and termites. They are arboreal, and although they do occasionally descend to the ground to forage, they spend as much as 87% of their time over 15 m (50 ft) above the ground, particularly in eucalyptus trees. They are nocturnal, spending the day resting in nests in tree hollows, lined with leaves or shredded bark. [9] They are social animals, and up to five may share a single nest, especially during the breeding season. [10]

They are highly adept climbers, able to cling to the smooth trunks of eucalyptus trees. In experiments, they have even proved able to climb vertical panes of glass, a feat that is due to a combination of fine skin ridges and sweat that allow their feet to function as suction cups. [11] Movement through the trees is aided by their gliding ability; they are able to glide as far as 28 m (92 ft), and typically do so three to five times every hour through the night.

Feathertail gliders do not hibernate as such, but are capable of entering torpor during cold weather at any time of the year. Torpor can last for several days, during which time the animal's body temperature can drop to as low as 2 °C (36 °F) and oxygen consumption to just 1% of normal. [4] Torpid gliders curl into a ball, wrapping their tail around themselves and folding their ears flat, and often huddling together with up to four other individuals to reduce heat loss [12] and conserve energy. [13]

The breeding season lasts from July to January in Victoria, and may be longer further to the north. [4] Females typically give birth to two litters of up to four young in a season, and are able to mate again shortly after the first litter is born. The second litter then enters embryonic diapause, and is not born until the first litter has finished weaning at about 105 days. [14] Multiple paternity is common, even within litters, as the females are sexually promiscuous. [15] The young remain in the pouch for the first 65 days of life, [10] and the maximum lifespan is about five years. [4]

In captivity

Taronga Zoo (Sydney, Australia) was the first zoo to breed feathertail gliders in captivity. The New Zoo in Poznań, Poland, was first European zoo to begin exhibiting feather-tail gliders in 1999 (their animals originated from Taronga Zoo stock). Some of the feathertail gliders born in Poznań have been sent to other European zoos, meaning that the entire European captive population is of Poznań descent. [16]

In culture

A feathertail glider was featured on the reverse of the Australian 1-cent coin until 1991 when the 1-cent denomination was discontinued. [17]

Related Research Articles

<span class="mw-page-title-main">Sugar glider</span> Species of Australian marsupial

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.

<span class="mw-page-title-main">Phalangeriformes</span> Suborder of arboreal marsupials

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.

<span class="mw-page-title-main">Diprotodontia</span> Order of marsupial mammals

Diprotodontia is the largest extant order of marsupials, with about 155 species, including the kangaroos, wallabies, possums, koala, wombats, and many others. Extinct diprotodonts include the hippopotamus-sized Diprotodon, and Thylacoleo, the so-called "marsupial lion".

<span class="mw-page-title-main">Honey possum</span> Species of marsupial

The honey possum or noolbenger, is a tiny species of marsupial that feeds on the nectar and pollen of a diverse range of flowering plants. Found only in southwest Australia, it is an important pollinator for such plants as Banksia attenuata, Banksia coccinea and Adenanthos cuneatus.

<span class="mw-page-title-main">Acrobatidae</span> Family of marsupials

The Acrobatidae are a small family of gliding marsupials containing two genera, each with a single species, the feathertail glider from Australia and feather-tailed possum from New Guinea.

<i>Petaurus</i> Genus of marsupials

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.

<span class="mw-page-title-main">Australidelphia</span> Superorder of marsupials

Australidelphia is the superorder that contains roughly three-quarters of all marsupials, including all those native to Australasia and a single species — the monito del monte — from South America. All other American marsupials are members of the Ameridelphia. Analysis of retrotransposon insertion sites in the nuclear DNA of a variety of marsupials has shown that the South American monito del monte's lineage is the most basal of the superorder.

<span class="mw-page-title-main">Tasmanian pygmy possum</span> Species of marsupial

The Tasmanian pygmy possum, also known as the little pygmy possum or tiny pygmy possum, is the world's smallest possum. It was first described by Oldfield Thomas in 1888, after he identified that a museum specimen labelled as an eastern pygmy possum in fact represented a species then unknown to science. The holotype resides in the Natural History Museum in London.

<span class="mw-page-title-main">Common ringtail possum</span> Species of marsupial

The common ringtail possum is an Australian marsupial.

<i>Antechinus</i> Genus of marsupials

Antechinus is a genus of small dasyurid marsupial endemic to Australia. They resemble mice with the bristly fur of shrews.

There are many different types of gliding possum, sometimes referred to as volplane possum, flying phalangers, or simply as gliders:

Glider may refer to:

<span class="mw-page-title-main">Mahogany glider</span> Species of marsupial

The mahogany glider is an endangered gliding possum native to a small region of coastal Queensland in Australia.

<span class="mw-page-title-main">Southern brown bandicoot</span> Species of marsupial

The southern brown bandicoot is a short-nosed bandicoot, a type of marsupial, found mostly in southern Australia. A subspecies in Western Australia was also known as the quenda in South Western Australia. This subspecies was elevated to species in 2018.

<span class="mw-page-title-main">Eastern pygmy possum</span> Species of marsupial

The eastern pygmy possum is a diprotodont marsupial of south-eastern Australia. Occurring from southern Queensland to eastern South Australia and also Tasmania, it is found in a range of habitats, including rainforest, sclerophyll forest, woodland and heath.

<span class="mw-page-title-main">Western pygmy possum</span> Species of marsupial

The western pygmy possum, also known as the southwestern pygmy possum or the mundarda, is a small marsupial found in Australia. Genetic studies indicate its closest relative is probably the eastern pygmy possum, from which its ancestors diverged around eight million years ago.

<span class="mw-page-title-main">Greater glider</span> Genus of marsupials

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.

<span class="mw-page-title-main">Petauroidea</span> Superfamily of marsupials

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.

References

  1. ↑ Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press. p. 56. ISBN   0-801-88221-4. OCLC   62265494.
  2. 1 2 Dickman, C.; McKenzie, N. & Menkhorst, P. (2016). "Acrobates pygmaeus". IUCN Red List of Threatened Species . 2016: e.T40584A21963834. doi: 10.2305/IUCN.UK.2016-2.RLTS.T40584A21963834.en . Retrieved 12 November 2021.
  3. ↑ "Acrobates pygmaeus (G. Shaw, 1794)". ASM Mammal Diversity Database. American Society of Mammalogists . Retrieved 2007-02-16.
  4. 1 2 3 4 5 6 7 8 9 10 Harris, J.M. (July 2015). "Acrobates pygmaeus (Diprotodontia: Acrobatidae)". Mammalian Species. 47 (920): 32–44. doi: 10.1093/mspecies/sev003 .
  5. ↑ Shiroff, A. (1999). "Acrobates pygmaeus feathertail glider". Animal Diversity Web. Retrieved 1 May 2016.
  6. ↑ Jackowiak, H.; Godynicki, S. (October 2007). "Light and scanning electron microscopic study on the structure of the lingual papillae of the feathertail glider (Acrobates pygmeus, Burramyidae, Marsupialia)". The Anatomical Record. 290 (11): 1355–1365. doi:10.1002/ar.20606. PMID   17929291. S2CID   20355244.
  7. ↑ Aitken, L.M.; Nelson, J.E. (1989). "Peripheral and central auditory specialization in a gliding marsupial, the feathertail glider, Acrobates pygmaeus". Brain, Behavior and Evolution. 33 (6): 325–333. doi:10.1159/000115940. PMID   2765851.
  8. ↑ Hocknull, S.A.; et al. (December 2007). "Responses of Quaternary rainforest vertebrates to climate change in Australia". Earth and Planetary Science Letters. 264 (1–2): 317–331. Bibcode:2007E&PSL.264..317H. doi:10.1016/j.epsl.2007.10.004.
  9. ↑ Lindenmayer, D.B.; et al. (1991). "Aspects of the use of den trees by arboreal and scansorial marsupials inhabiting montane ash forests in Victoria". Australian Journal of Zoology. 39 (1): 57–65. doi:10.1071/ZO9910057.
  10. 1 2 Ward, S.J. (1990). "life-history of the feathertail glider, Acrobates pygmaeus (Acrobatidae, Marsupialia) in south-eastern Australia". Australian Journal of Zoology. 38 (5): 503–517. doi:10.1071/zo9900503.
  11. ↑ Rosenberg, H.I. & Rose, R. (1999). "Volar adhesive pads of the feathertail glider, Acrobates pygmaeus (Marsupialia; Acrobatidae)". Canadian Journal of Zoology. 77 (2): 233–248. doi:10.1139/z98-212.
  12. ↑ Fleming, M.R. (1985). "The thermal physiology of the feathertail glider, Acrobates pygmaeus (Marsupialia:Burramyidae)". Australian Journal of Zoology. 33 (5): 667–681. doi:10.1071/ZO9850667.
  13. ↑ Nowack, J.; Geiser, F. (2015). "Friends with benefits: the role of huddling in mixed groups of torpid and normothermic animals". Journal of Experimental Biology. 219 (4): 590–596. doi: 10.1242/jeb.128926 . PMID   26685170.
  14. ↑ Ward, S.J.; Renfree, M.B. (October 1988). "Reproduction in females of the feathertail glider Acrobates pygmaeus (Marsupialia)". Journal of Zoology. 216 (2): 225–239. doi:10.1111/j.1469-7998.1988.tb02427.x.
  15. ↑ Parrott, M.L.; Ward, S.J. & Taggart, D.A. (April 2005). "Multiple paternity and communal maternal care in the feathertail glider (Acrobates pygmaeus)". Australian Journal of Zoology. 53 (2): 79–85. doi:10.1071/ZO04025.
  16. ↑ Russo, Naomi (29 June 2015). "Successful breeding of the world's smallest gliders". Australian Geographic. Retrieved 13 January 2023.
  17. ↑ "The Feathertail Glider". Archived from the original on 2007-02-20. Retrieved 2007-02-16.
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