Native Range
New Guinea & beyond
Green tree pythons are found primarily across the island of New Guinea — both the Indonesian-controlled western half (Papua) and the independent nation of Papua New Guinea — along with parts of eastern Indonesia, the Cape York Peninsula in northern Australia, and several offshore islands.
Within this range, GTPs have evolved into distinct geographic populations called "localities." Sorong, Biak, Aru, Jayapura, Merauke, Wamena, Cyclops Mountains — each represents a different region with subtle differences in adult color, pattern, size, and even temperament. Locality is central to serious GTP keeping and breeding.
Climate
Tropical rainforest
Behavior in the Wild
Life in the canopy
Wild GTPs spend nearly their entire lives in trees — descending only rarely, typically when females come down to lay eggs. Their iconic coiled-on-a-branch posture is not just for sleep; it's the position from which they hunt, often for days at a time. Color change throughout life is one of the species' most fascinating features. Hatchlings are bright yellow or red, gradually transforming to the iconic adult green over their first 1–2 years — a process called "ontogenetic color change."
Conservation Status
CITES Appendix II
Green tree pythons are listed under CITES Appendix II, meaning international trade is regulated to prevent overharvesting. Wild populations face pressure from illegal collection for the pet trade, deforestation, and habitat fragmentation in New Guinea. Captive-bred GTPs from ethical breeders are central to reducing demand on wild populations — and to making the species' beauty accessible without harming wild ecosystems.