The black-headed python (''Aspidites melanocephalus'') Mehrtens JM (1987). ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. . is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

snake Snakes are elongated limbless reptiles of the suborder Serpentes (). Cladistically squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales much like other members of the group. Many species of snakes have s ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Pythonidae The Pythonidae, commonly known as pythons, are a Family (biology), family of Venomous snake, nonvenomous snakes found in Africa, Asia, and Australia. Among its members are some of the largest snakes in the world. Ten Genus, genera and 39 specie ...

(the python family). The species is

endemic Endemism is the state of a species being found only 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 foun ...

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

. There are no

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

that are recognized as being valid.

Description

Adults of ''A. melanocephalus'' typically grow to in length (including tail),Burnie, David; Wilson, Don E. (Editors-in-Chief) (2001). ''Animal''. London: Dorling Kindersley. 624 pp. . but can grow to a maximum length of . The body is muscular with a flattened profile, while the tail tapers to a thin point. The top of the head is covered by large symmetrical scales. The

dorsal scales In snakes, the dorsal scales are the longitudinal series of plates that encircle the body, but do not include the ventral scales. Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere''. Ithaca and London: Comstock Publis ...

, which are smooth and

glossy Gloss is an optical property which indicates how well a surface reflects light in a specular (mirror-like) direction. It is one of the important parameters that are used to describe the visual appearance of an object. Other categories of visual a ...

, number 50-65 rows at midbody, while 315-355

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 cont ...

occur. The tail has 60-75 mainly single

subcaudal scales In snakes, the subcaudal scales are the enlarged plates on the underside of the tail. Wright AH, Wright AA (1957). ''Handbook of Snakes of the United States and Canada''. Comstock Publishing Associates, a Division of Cornell University Press. (7t ...

and the anal scale is single. The posterior subcaudals tend to be divided, often irregularly. The color pattern consists of shades of black, dark grey, brown, gold, and cream arranged in a banded or brindled pattern. The belly is light-colored, flecked with darker spots. The head is shiny black that also extends down the neck and throat for several inches.

Distribution and habitat

The species ''A. melanocephalus'' is found in

, in the northern half of the country, excluding the very arid regions. The type locality given is "Port Denison Bowen",

Queensland, Australia Queensland ( , commonly abbreviated as Qld) is a state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Australia and New South Wales to the west, ...

. It occurs in humid

tropical The tropics are the regions of Earth surrounding the equator, where the sun may shine directly overhead. This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's ax ...

to semiarid conditions.

Behavior

''A. melanocephalus'' is terrestrial and is often found amongst rocks and loose debris. If disturbed, it hisses loudly, but is unlikely to bite unless hunting prey. It sometimes strikes with a closed mouth, but generally can be handled easily. It is a strong swimmer, but is almost never found in water. It is not

venomous Venom or zootoxin is a type of toxin produced by an animal that is actively delivered through a wound by means of a bite, sting, or similar action. The toxin is delivered through a specially evolved ''venom apparatus'', such as fangs or a sti ...

Feeding

The diet of ''A. melanocephalus'' consists mainly of

reptile Reptiles, as commonly defined, are a group of tetrapods with an ectothermic metabolism and Amniotic egg, amniotic development. Living traditional reptiles comprise four Order (biology), orders: Testudines, Crocodilia, Squamata, and Rhynchocepha ...

s, including

snakes Snakes are elongated Limbless vertebrate, limbless reptiles of the suborder Serpentes (). Cladistically Squamata, squamates, snakes are ectothermic, amniote vertebrates covered in overlapping Scale (zoology), scales much like other members of ...

, but it will eat

mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...

s and some

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

s if available.

Skink Skinks are a type of lizard belonging to the family (biology), family Scincidae, a family in the Taxonomic rank, infraorder Scincomorpha. With more than 1,500 described species across 100 different taxonomic genera, the family Scincidae is one o ...

s are the primary prey of the black-headed python. Other important prey include

gecko Geckos are small, mostly carnivorous lizards that have a wide distribution, found on every continent except Antarctica. Belonging to the infraorder Gekkota, geckos are found in warm climates. They range from . Geckos are unique among lizards ...

s, bearded dragons,

legless lizard Legless lizard may refer to any of several groups of lizards that have independently lost limbs or reduced them to the point of being of no use in locomotion.Pough ''et al.'' 1992. Herpetology: Third Edition. Pearson Prentice Hall:Pearson Education ...

s and the perentie, the largest monitor lizard native to Australia, as well as other black-headed pythons. When ingesting large prey, it positions one or two coils just ahead of its distended mouth and by constriction makes the task of swallowing easier.

Reproduction

''A. melanocephalus'' is

oviparous Oviparous animals are animals that reproduce by depositing fertilized zygotes outside the body (i.e., by laying or spawning) in metabolically independent incubation organs known as eggs, which nurture the embryo into moving offsprings kno ...

. Adult females lay five to 10 eggs per clutch. The females stay coiled about the eggs and incubate them until they hatch, which is usually after 2–3 months. The young take small prey as soon as two days after hatching. Immature individuals are vulnerable to predation. Adults have no natural predators other than

dingo The dingo (either included in the species ''Canis familiaris'', or considered one of the following independent taxa: ''Canis familiaris dingo'', ''Canis dingo'', or ''Canis lupus dingo'') is an ancient (basal (phylogenetics), basal) lineage ...

s and humans.

Captivity

Due to its docile nature and striking color pattern, ''A. melanocephalus'' has become very desirable as an exotic pet. It is bred in captivity and can be relatively easily obtained, but does command a high price. As it can be a muscular snake and reaches a fairly substantial size, prospective owners should consider a suitable enclosure, as well as temperature and feeding requirements.

In human culture

''A. melanocephalus'' is mentioned in, or plays a central role in, the stories of the

Indigenous Australians Indigenous Australians are people with familial heritage from, or recognised membership of, the various ethnic groups living within the territory of contemporary Australia prior to History of Australia (1788–1850), British colonisation. The ...

Dreamtime The Dreaming, also referred to as Dreamtime, is a term devised by early anthropologists to refer to a religio-cultural worldview attributed to Australian Aboriginal religion and mythology, Australian Aboriginal mythology. It was originally u ...

tradition.