How to Identify the Olive Python (Identification Guide)
The Olive Python is one of Australia's largest snakes, recognized by its smooth olive-brown to purplish coloration with little to no pattern and its powerful, elongated build.
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Key identifying features
The Olive Python (Liasis olivaceus) is a large, non-venomous constrictor native to northern and northwestern Australia. It is identified by its plain, virtually unpatterned olive-brown to purplish-brown coloration, a trait that sets it apart from the boldly blotched carpet pythons found in the same region, along with a robust, elongated body among the largest of any Australian snake.
Coloration & pattern
The body is generally a uniform olive-brown, tan, or purplish-brown color with little to no visible blotching or banding, sometimes showing a faint darker tinge along the back. In certain light the scales can show a subtle purplish or bronze iridescent sheen. The belly is pale cream to white and unmarked. This lack of strong pattern is one of the clearest identifying traits distinguishing it from patterned pythons sharing its range.
Head, eyes & scales
The head is broad, elongated, and distinct from the neck, with small irregular scales and well-developed heat-sensing pits along the upper and lower lips. Eyes are relatively small with vertical, cat-like pupils. Scales are smooth and glossy across the body.
Size & body shape
The Olive Python is one of Australia's largest snake species, with adults commonly reaching 3–4 m (10–13 ft) and occasionally growing larger. The body is powerfully built and elongated, reflecting its capacity to take relatively large prey.
Range & habitat where you'll see it
This species is found across northern Western Australia, the Northern Territory, and parts of Queensland, inhabiting rocky gorges, riverine areas, and areas near permanent water sources such as gorges and waterholes. It shelters in rock crevices and caves during the day and is most active at dusk and after dark.
How to tell it apart from look-alikes
The Olive Python's plain, largely unpatterned coloration readily distinguishes it from the boldly blotched carpet pythons and other patterned python species found across the same range. Its very large size also sets it apart from most other Australian pythons except the largest carpet python individuals. It differs from venomous northern elapids such as the mulga snake by its heat-sensing pits, vertical pupils, and much heavier, longer body, since elapids lack pits and have round pupils.
Frequently asked questions
What makes the Olive Python easy to identify?
Its plain, largely unpatterned olive-brown to purplish body sets it apart from the boldly blotched carpet pythons found in the same range.
Is the Olive Python venomous?
No, it is a non-venomous constrictor.
How large does the Olive Python get?
It is one of Australia's largest snakes, with adults commonly reaching 3–4 m and sometimes more.
Where does the Olive Python live?
It is found across northern Western Australia, the Northern Territory, and parts of Queensland, often near gorges and permanent water.