Python regius is a nonvenomous python species found in Africa. This is the smallest of the African pythons and is popular in the pet trade, largely due to its typically docile temperament. No subspecies are currently recognized. It is also known as royal
python or ball python.
The name "ball
python" refers to the animal's tendency to curl into a ball when stressed or frightened. The name "royal python" (from the Latin regius) is based in part on the story that Cleopatra supposedly wore the snake around her wrist.
Adults generally do not grow to more than 90–120 cm (3.0–3.9 ft) in length, although some specimens have reached 152–182 cm (5.0–6.0 ft), but this is very rare. Females tend to be slightly bigger than males, maturing at an average of 122–137 cm (4.0–4.5 ft). Males usually average around 90–107 cm (3.0–3.5 ft).
The build is stocky while the head is relatively small. The scales are smooth and both sexes have anal spurs on either side of the vent. 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). When probing to determine sex, males typically measure eight to ten subcaudal scales, and females typically measure two to four subcaudal scales.