Green Tree Python (Morelia viridis) Care Sheet
A comprehensive guide for the successful keeping of this sensitive, highly specialized arboreal snake, requiring extreme attention to humidity, temperature zoning, and specific perching.
1. Overview & Commitment
The Green Tree Python (GTP) is a stunning, strictly arboreal snake from the rainforests of New Guinea and Indonesia. They are slender and typically reach 1.2 – 1.8 m (4 – 6 feet). Due to their delicate nature, specific perching needs, and often defensive temperament, they are generally considered display animals and an advanced project. They are strictly nocturnal.
2. Vivarium/Enclosure
GTPs require a tall, vertical habitat; a minimum of 60 x 60 x 90 cm (24 x 24 x 36 inches) or taller is required. Enclosures must minimize uncontrolled ventilation to maintain humidity. The structure is critical: provide multiple, sturdy horizontal perches (varying diameters from 2–5 cm) at different heights. The snake should be able to coil fully on the perch. Dense foliage (live or artificial) must be used liberally for security.
3. Substrate
The substrate must be designed to retain maximum moisture. A deep layer of Cypress Mulch, Coconut Fiber (Coco Coir), and Sphagnum Moss should be kept damp at all times. A false bottom or drainage layer is recommended to prevent the waterlogged substrate from resting against the bottom of the enclosure.
4. Heating & Temperature
GTPs require temperature consistency. The overall ambient temperature should be 24°C – 27°C (75°F – 80°F). A specific hot spot perch must be provided near the top of the enclosure, reaching a surface temperature of 31°C – 32°C (88°F – 90°F), generated by a guarded overhead heat source (DHP or CHE). Temperatures must remain stable, rarely dropping below 24°C (75°F), even at night.
5. Lighting & UV
Low-level UVB (e.g., a 6% T5 tube) is beneficial, positioned near the top perches. A simple LED light should be used to provide a 12-hour day/night cycle. Bright lighting should be avoided during the day.
6. Humidity & Hydration
Stable, high humidity is mandatory, maintained between 60% and 80% ambient, with spikes up to 90% in the evening. Fluctuations lead to dangerous respiratory infections and poor sheds. An automated misting or fogging system is highly recommended. While they drink water droplets, a small, elevated water dish should be provided.
7. Diet & Feeding
GTPs are carnivores. Feed an appropriately sized frozen/thawed mouse or small rat every 10–14 days for an adult. Overfeeding is very common and detrimental. Prey should be offered using long tongs, often dangled or placed near the snake’s perch to encourage a nocturnal feeding strike. Avoid live prey completely due to the high risk of injury to the snake.
8. Handling & Maintenance
GTPs are nervous and defensive; handling should be avoided entirely except for necessary health checks or enclosure cleaning. Use a snake hook to safely manage the snake and move it onto new perches. Focus on keeping perches and foliage clean to prevent bacterial growth in the high-humidity environment.