Common Spotted Cuscus

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Common Spotted Cuscus[1]

Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Subclass: Marsupialia
Order: Diprotodontia
Family: Phalangeridae
Genus: Spilocuscus
Species: S. maculatus
Binomial name
Spilocuscus maculatus
(E. Geoffroy, 1803)

The Common Spotted Cuscus (Spilocuscus maculatus) is a cuscus, a marsupial animal that lives in the Cape York Peninsula region of Australia and New Guinea.

Contents

[edit] Description

The Common Spotted Cuscus is about the size of a large house cat, weighing between 3-13lbs (1.5-6kg), body size approximately 13-26inches (34.8-65cm) long, and a tail one to two feet long (31.5-60cm).[3] It has a round head, small hidden ears, thick fur, and a prehensile tail to aid in climbing. Its eyes range in color from yellows and oranges to reds, and are slit much like a snake. All four of its limbs have five digits and strong, curved claws, except the first digit on each foot. The second and third digits of the hind foot are partly syndactylous: they are united by skin at the top joint but divide at the claws. These smaller claws can serve as hair combs when cleaning. The first and second digits of the forefoot are opposable to the other three, helping it grip branches while climbing. The undersides of its paws are bare and striated, which also help it grasp trees and food. The first digit on the hind foot is clawless and opposable.[4]

It has thick, woolly fur of varying colors depending on age, sex, and location. Males are typically grey/white or brown/white with splotchy patterns on their back and a white underbelly.[3] Females are usually white or grey, and unspotted. Some completely white individuals are known in both males and females. As the young grow they go through a series of color changes before reaching sexual maturity at around one year old. Coloration varies from reds, whites, buffs, browns, light greys, and blacks. Unlike other species of cuscuses or possums, the Common Spotted Cuscus does not have a dorsal stripe on its fur.[5]

The curled, prehensile tail is a distinctive characteristic of the Common Spotted Cuscus. The upper part of the tail closest to the body is covered in fur, while the lower half is covered in rough scales on the inside surface to grip branches.[3]

[edit] Behavior

The Common Spotted Cuscus is typically very shy, so it is rarely seen especially in northern Australia. It is nocturnal, hunting and feeding at night and sleeping during the day on self-made platforms in tree branches. It also has been found resting in tree hollows, under tree roots, or among rocks. It is slow moving and somewhat sluggish, sometimes mistaken for sloths, other possums, or even monkeys. Unlike its close relatives, the Common Spotted Cuscus has been observed feeding during the day on rare occasions.[3]

The Common Spotted Cuscus is typically a solitary creature, feeding and nesting alone. Interactions with others, especially between competing males, can be aggressive and confrontational. Male cuscuses scent mark their territory to warn off other males, emitting a penetrating musk odor both from their bodies and scent gland excretions. They distribute saliva on branches and twigs of trees to inform others of their territory and mediate social interactions. If they encounter another male in their area, they make barking, snarling and hissing noises, and stand upright to defend their territory. They are aggressive, and can scratch, bite and kick potential predators.[6]

[edit] Mating

Cuscuses mate year-round and with multiple partners, conducting courtship on tree limbs.[6] The gestation period for a pregnant female is around 13 days, with a pouch period of 6-7 months.[3] While females have four teats in their pouches and can have up to 3 young per birth, they seldom suckle more than two.[6] Each young weighs no more than 1 gram at birth, and is held in the mother's well-developed forward-opening pouch. Cuscuses can live to be 11 years old, and reach sexual maturity around one year old.[3]

[edit] Habitat and environment

The Common Spotted Cuscus lives in rainforests, mangroves, hardwood and eucalypt forests below 1,200m; unlike its relatives, it is not restricted to rainforest environments, instead favoring temperate arid and alpine woodlands.[6] Because it lives in dense wooded habitats, they are not easily seen, especially in Australia.

It is debated whether cuscuses originated in Australia and then migrated to New Guinea, or vice versa.[5] It is believed that over the past million years there have been waves of migration during periods of low sea levels that exposed seabed across the Torres Strait. Currently the Common Spotted Cuscus resides in Cape York, Queensland, in northeastern Australia, as well as New Guinea. It inhabits areas as far west as Celebes and as far east as the Solomon Islands.[4]

[edit] Diet

The Common Spotted Cuscus has an unspecialized dentition, allowing it to eat a wide variety of plant products.[6] It eats the leaves of ficus, alstonia, slonea plants, as well as the fruits of ficus, lithocarpus, aglia, and possibly mischocarpus and pometia plants.[7] It is also known to eat flowers, small animals, and occasionally eggs. Predators of the Common Spotted Cuscus include pythons and some birds of prey.

[edit] Human interactions

Ther Common Spotted Cuscus is hunted for its meat and pelt in New Guinea, but has very little economical influence. Despite hunting, it is still common in New Guinea and most islands; however it is rarely spotted in Australia, mostly due to the fact that it is a very shy creature. It was introduced by humans to Salyer, Mussau, and New Ireland islands, and has since flourished in these areas.[7] The conservation status of the Common Spotted Cuscus is least concern because of its wide population distribution, ability to flourish in a variety of environments, and lack of dominating predators.[2] However continued human expansion, an increase in demand for cuscus meat and pelts, and destruction of its natural habitat could lead to a demise in the spotted cuscus predominance.

[edit] References

  1. ^ Groves, Colin (16 November 2005). in Wilson, D. E., and Reeder, D. M. (eds): Mammal Species of the World, 3rd edition, Johns Hopkins University Press, 48. ISBN 0-801-88221-4. 
  2. ^ a b Australasian Marsupial & Monotreme Specialist Group (1996). Spilocuscus maculatus. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 12 May 2006.
  3. ^ a b c d e f Grzimek, Bernhard (1990). "Spotted Cuscus", Grzimek's Encyclopedia of Mammals. South Orange, NJ: McGraw-Hill Company. 
  4. ^ a b Paradiso, John L., and Ronald M. Nowak (1983). "Spotted Cuscus", Walker's Mammals of the World. Baltimore: Johns Hopkins Univ. Press. 
  5. ^ a b Ride, W.D.L. (1970). A Guide to the Native Mammals of Australia. Sydney: Halstead P, 72. 
  6. ^ a b c d e (1984) "Spotted Cuscus", in Macdonald, David, ed.: Encyclopaedia of Mammals: 2. London: George Allen and Unwin. 
  7. ^ a b Flannery, Timothy (1990). Mammals of New Guinea. Carina: Robert Brown and Associates, p130-132. 

[edit] External links