Python regius is a non-venomous python species found in Africa. This is the smallest of the African pythons and is popular in the pet trade. No subspecies are currently recognized.[3]

Adults generally do not grow to more than 90 - 120 cm (3.0 - 3.9 ft) in length,[2] although some specimens have reached 152 cm and even 182 cm (5 - 6 feet), but this is very rare.[4] Females tend to be slightly bigger than males maturing at an average of 4-4.5 feet. Males usually average around 3-3.5 feet.[5] The build is stocky[2] while the head is relatively small. The scales are smooth[4] and both sexes have anal spurs on either side of the vent.[6] Although males tend to have larger spurs, this is not definitive, and sex is best determined via manual eversion of the male hemipenes or inserting a probe into the cloaca to find the inverted hemipenes (if male).[7]

The color pattern is typically black or dark brown with light brown or gold sides and dorsal blotches. The belly is a white or cream that may or may not include scattered black markings.[4] However, those in the pet industries have, through selective breeding, developed many morphs(genetic mutations) with altered colors and patterns.[8]

Royal python, ball python.[2]

The name ball python refers to the animal's tendency to curl into a ball when stressed or frightened.[9] The name royal python (from the Latin "regius") is based in part on the story that Cleopatra supposedly wore the snake around her wrist.

Found in Africa from Senegal, Mali, Guinea-Bissau, Guinea, Sierra Leone, Liberia, Ivory Coast, Ghana, Benin, Niger and Nigeria through Cameroon, Chad and the Central African Republic to Sudan and Uganda. No type locality was given in the original description.[1]

Prefers grasslands, savannahs and sparsely wooded areas.[2]

This terrestrial species is known for its defense strategy that involves coiling into a tight ball when threatened, with its head and neck tucked away in the middle. In this state, it can literally be rolled around. Favored retreats include mammal burrows and other underground hiding places where they also aestivate. In captivity they are considered good pets, for their relatively small size and placid nature make them easy to handle.[2]

In the wild, the diet consists mostly of small mammals, such as African soft-furred rats, shrews and striped mice. Younger individuals have also been known to feed on birds. Pythons that are imported from the wild tend to be picky eaters and may not respond to food as well as captive-bred pythons, which usually do well on domestic rats and mice, either live, pre-killed, or frozen-thawed.[4] The size of the prey item given to a python should be equivalent to or slightly larger than the width of the largest part of their body. This python is known for being a picky eater and may not eat for months, particularly during the winter breeding season. While this is not odd, care should be taken to watch that the snake does not experience significant weight loss.[10]

Oviparous, with anywhere from 3-11 rather large, leathery eggs being laid (4-6 being most common).[4] These are incubated by the female underground and hatch after 55 to 60 days. Sexual maturity is reached at 6 - 18 months for males, 12 - 36 months for females. Age is only one factor in determining sexual maturity and ability to breed - weight is the second factor. Males will breed at 500 grams or less, but in captivity are often not bred until they are 800 grams (1.7 lbs.), and females will breed in the wild at weights as low as 800 grams, though 1200 grams or more is most common--in captivity, breeders generally wait until they are no less than 1500 g (3.3 lbs.). Parental care of the eggs ends once they hatch, and the female leaves the offspring to fend for themselves.[7]

Due to their smaller size compared to other pythons and commonly docile temperament, these snakes are bred in captivity and have become popular as pets.[11] Juveniles tend to be more aggressive at first, but typically calm down as they get used to human contact. Wild-caught specimens have greater difficulty adapting to a captive environment, which can result in refusal to feed, and they generally carry internal or external parasites which must be eliminated by administering anti-parasitic drugs. Specimens have survived for over 40 years in captivity.[12] In Captivity, most adult Python regius should be kept in a minimum of a 20 gallon long glass tank, as these pythons are ground dwellers and are highly secretive and largely sedentary. Some large females may require cages up to the size of a 40 gallon long tank. Also, at least two hiding places should be provided at different ends of the tank, one should have a thermostat-controlled heating pad under it to allow the animal to regulate its temperature. Be aware that most snakes are escape artists, therefore the tank you select should have a locking lid. Juveniles in particular may be stressed by overly large cages that do not have sufficient small hiding spaces. Controlled temperatures of 80F with a 90F basking area on one end of the cage are necessary for proper health. Humidity should be maintained at 60% to 80% with dry substrate.[7]

This species is particularly revered in the traditional religion of the Igbo people of southeastern Nigeria. It is considered symbolic of the earth, being an animal that travels so close to the ground. Even among many Christian Igbos, these pythons are treated with great care whenever they happen to wander into a village or onto someone's property; they are allowed to roam freely or are very gently picked up and placed out in a forest or field away from any homes. If one is accidentally killed, many communities in Igboland will still build a coffin for the snake's remains and give it a short funeral.[13]