The olive python (''Liasis olivaceus'')
a
Pilbara Pythons
. Accessed 4 August 2008. is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

snake Snakes are elongated, Limbless vertebrate, limbless, carnivore, carnivorous reptiles of the suborder Serpentes . Like all other Squamata, squamates, snakes are ectothermic, amniote vertebrates covered in overlapping Scale (zoology), scales. Ma ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Pythonidae The Pythonidae, commonly known as pythons, are a family of nonvenomous snakes found in Africa, Asia, and Australia. Among its members are some of the largest snakes in the world. Ten genera and 42 species are currently recognized. Distributi ...

. The species is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

. Two

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

are recognized, including the

nominate subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

described here.

Description

With adults reaching over 4 m (13 ft) in total length (including the tail), ''L. olivaceus'' is Australia's third-largest snake species (surpassed only by the

amethystine python The amethystine python ('' Simalia amethistina'', formerly known as ''Morelia amethistina''), also known as the scrub python or ''sanca permata'' in Indonesian, is a species of non-venomous snake in the family Pythonidae. The species is found ...

and

Oenpelli python The Oenpelli python or Oenpelli rock python (''Simalia oenpelliensis'' or ''Nyctophilopython oenpelliensis'') is a species of large snake in the family Pythonidae. The species is endemic to the sandstone massif area of the western Arnhem Land reg ...

). Its high number of dorsal scale rows (61–72 at midbody), makes the skin look smoother than that of other pythons. The number of

ventral scales In snakes, the ventral scales or gastrosteges are the enlarged and transversely elongated scales that extend down the underside of the body from the neck to the anal scale. When counting them, the first is the anteriormost ventral scale that conta ...

is 355–377. The colour pattern is a uniform chocolate brown to olive green, while the belly is usually cream-coloured.Olive Python
a
Currumbin Wildlife Sanctuary
. Accessed 4 August 2008. The adult weight is typically , and a large female can exceed in captivity. Unfortunately, this species is occasionally confused with the venomous king brown snake, ''

Pseudechis australis The king brown snake (''Pseudechis australis'') is a species of highly venomous snake of the family Elapidae, native to northern, western, and Central Australia. Despite its common name, it is a member of the genus ''Pseudechis'' (black snakes) ...

'', and may be mistakenly killed based on the misidentification.

Distribution and habitat

''L. olivaceus'' is found in

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

, the

Northern Territory The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory ...

, and

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

. The type locality given is "North Australia;

Port Essington Port Essington is an inlet and historic site located on the Cobourg Peninsula in the Garig Gunak Barlu National Park in Australia's Northern Territory. It was the site of an early attempt at British settlement, but now exists only as a remote ...

" (Northern Territory, Australia).

Habitat

The olive python occurs in rocky areas, gorges, and especially rocky areas near sources of water. Typically, shelter is sought in caves and rock crevices, but individuals have also been found in hollow logs and burrows under rocks.

Diet

The diet of ''L. olivaceus'' consists of

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

mammal Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or ...

s (including rock wallabies and

fruit bat Megabats constitute the family Pteropodidae of the order Chiroptera (bats). They are also called fruit bats, Old World fruit bats, or—especially the genera ''Acerodon'' and ''Pteropus''—flying foxes. They are the only member of the sup ...

s), birds (

duck Duck is the common name for numerous species of waterfowl in the family Anatidae. Ducks are generally smaller and shorter-necked than swans and geese, which are members of the same family. Divided among several subfamilies, they are a form t ...

s and spinifex pigeons), and other reptiles. It prefers to lie in wait next to an animal trail to ambush its prey. Alternatively, it is a strong swimmer and also hunts in waterholes, striking at prey from under the water. It is also known to prey on monitor lizards an
crocodiles

Reproduction

Mating activity of olive pythons starts in May and continues until mid-July. When successful, this is followed by a

gestation Gestation is the period of development during the carrying of an embryo, and later fetus, inside viviparous animals (the embryo develops within the parent). It is typical for mammals, but also occurs for some non-mammals. Mammals during pregna ...

period of 81–85 days, after which the

oviparous Oviparous animals are animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, most reptiles, and all pterosaurs, dinosaurs (including birds), and ...

female lays 12–40 eggs in late spring. The average

clutch A clutch is a mechanical device that engages and disengages power transmission, especially from a drive shaft to a driven shaft. In the simplest application, clutches connect and disconnect two rotating shafts (drive shafts or line shafts). ...

size is around 19 eggs. The hatchlings emerge after an incubation period around 50 days, each measuring about 35 cm in length.

Subspecies

Captivity

The olive python is often kept as a pet and is bred in captivity. It is technically an advanced-level species due to its size, habitat requirements, and strong feeding response, requiring a terrarium of a minimum of long, by high and wide. If raised properly, it is noted to be friendly, curious, and calm. In removing it from its enclosure, snake hooks be used so as to prevent the feeding response from being triggered, and once out, it can generally be freely handled calmly due to its placid nature.

Images

References

External links

Video of a wild Olive Python in Kakadu National Park, NT
*
Photo of wild Olive Python attempting to eat wallaby
{{Taxonbar, from=Q1814729 olivaceus Reptiles of Western Australia Reptiles described in 1842 Taxa named by John Edward Gray Snakes of Australia