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 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 ...

of snake in the

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 python family). 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 else ...

to Australia. No subspecies are currently recognized.

Description

Adults of ''A. melanocephalus'' typically grow to in total length (including tail), Burnie D, Wilson DE (Editors-in-Chief) (2001). ''Animal''. London: Dorling Kindersley. 624 pp. . but can grow to a maximum 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 In snakes, the ventral scales or gastrosteges are the enlarged and transversely elongated scales that extend down t ...

, 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. The factors that affect glo ...

, 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 and the

anal scale Anal may refer to: Related to the anus *Related to the anus of animals: ** Anal fin, in fish anatomy ** Anal vein, in insect anatomy ** Anal scale, in reptile anatomy *Related to the human anus: ** Anal sex, a type of sexual activity involv ...

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

Queensland, Australia ) , 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_ ...

. It occurs in humid

tropical The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to ...

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 reptiles, including snakes, but it will eat mammals if available. Because the black-headed python lives in the tropics, it heats up quicker and stays warmer for longer. This means it can eat more because it digests food quicker in warmer conditions. When ingesting large prey, this species 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. Adult females lay five to 10

eggs Humans and human ancestors have scavenged and eaten animal eggs for millions of years. Humans in Southeast Asia had domesticated chickens and harvested their eggs for food by 1,500 BCE. The most widely consumed eggs are those of fowl, especial ...

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, including cannibalism. Adults have no natural predators other than dingos and humans.

Captivity

Due to its docile nature and striking color pattern, ''A. melanocephalus'' has become very desirable as an

exotic pet An exotic pet is a pet which is relatively rare or unusual to keep, or is generally thought of as a wild species rather than as a domesticated pet. The definition varies by culture, location, and over time—as animals become firmly enough est ...

. 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 or Australian First Nations are people with familial heritage from, and membership in, the ethnic groups that lived in Australia before British colonisation. They consist of two distinct groups: the Aboriginal peoples ...

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 beliefs. It was originally used by Francis Gillen, quickly adopted by his co ...

tradition.