Reticulated Python

Overview

The reticulated python, or "retic," is probably the world's longest snake, reaching up to 30 feet ². Its name comes from the Latin for "made like a net," after its net-like pattern ⁴. In captivity, PetMD gives an average of 10 to 14 feet for males. Females reach at least 16 feet, can pass 20 feet and may weigh 250 pounds or more ¹. Retics grow fast: on a heavy feeding schedule they can pass 12 feet in two years ¹.

Captive-bred retics are often far calmer than the wild-caught imports of the past, and many are now as tame as Burmese pythons ¹. Even so, VCA says they should be kept only by skilled, experienced reptile keepers, because they can be unpredictable and may strike without warning ². PetMD agrees they are best left to experts ¹. Captive retics live roughly 12 to 20 years ¹. The longest recorded lifespan in captivity is 32 years ⁵.

Novel Fauna classifies the reticulated python as a large constrictor, our high-risk class. Read the safety section before you bring one home.

Natural history

Retics range widely across Southeast Asia, including Myanmar, Thailand, Laos, Cambodia, Vietnam, Malaysia, Singapore, the Philippines and much of Indonesia, with records as far west as Bangladesh and India's Nicobar Islands ⁴. They live in tropical rainforests, wetlands and grassland forests, often near water, and use it as cover for ambushing prey ⁵. They also turn up in agricultural and urban landscapes ⁵. They are partly arboreal ⁴. The species is heavily exploited for the skin trade ⁴.

Safety: a high-risk large constrictor

• Always have another adult present when you work with a giant snake ¹. LafeberVet recommends one handler for every 3 to 4 feet of snake ³.
• Never drape a constrictor around your neck ³.
• Expect bites. Retics can be bite-prone, especially when handled, even when you feel you "know" your snake ¹. Wash your hands first so you don't smell like rodents or rabbits ³.
• Feed defensively. Once the snake passes 6 feet, keep prey within easy reach, feed one snake per enclosure at a time, and use a snake hook, shield or board when removing uneaten prey ¹.
• No free roaming. PetMD does not recommend letting a retic roam a home with children or animals, and notes that even experienced adults can be hurt by a free-roaming snake ¹.
• Lock it up. Use an enclosure built for giant snakes, with a strong locking mechanism ¹.

Enclosure

Hatchlings can live in a 10- or 20-gallon terrarium before moving to a permanent enclosure ¹. Adults need an enclosure at least one and a half times their length. For all but the largest retics, 6 to 8 feet long is enough ¹. Growth is fast at first and then tapers off after a few years ¹. Keep decor simple, sturdy and easy to clean: retics are strong and will destroy fragile decorations and live plants ¹.

Retics are prone to "pushing" and roaming. This can mean the enclosure is too hot, humid or wet, or that the snake feels exposed. Persistent pushing can swell or permanently damage the face and mouth and lead to mouth rot or abscesses, so work out the cause ¹.

Temperature & lighting

• Hot spot: 88–92°F ¹.
• Daytime air: 80–88°F ¹.
• Night: 80–84°F is fine as long as a basking area stays available ¹.

Use several digital thermometers (hot spot, air and cool side), ideally with high and low alarms ¹. For giant snakes, PetMD prefers pig blankets, rigid thermostat-controlled heating pads, as the main heat source ¹.

Humidity

Most boas and pythons do well at 50 to 70% relative humidity ³. Provide a water bowl big enough for the snake to soak its whole body, and heavy enough that it can't tip it over ³.

Substrate

Choose something easy to clean and replace: newspaper, aspen shavings, cypress mulch, corrugated cardboard or snake carpet ¹.

Diet & supplementation

Whole prey supplies complete nutrition. Secure a permanent food supply before you buy a retic ¹. Their diet is the same as a similar-sized Burmese python ¹.

• Hatchlings. Start on just-weaned mice, then adult mice ¹.
• Up to 4 feet. One or two mice every 3 to 4 days. At 4 feet, move to medium and then larger rats ¹.
• Growing snakes. One or two prey items every 7 days. By 6 to 7 feet, switch to rabbits of about 3 pounds and size up as the snake grows ¹.
• Adults. From three years on, PetMD suggests one or two rabbits every 10 to 14 days, adjusted to body condition ¹.
• Avoid power-feeding. Don't power-feed for the first three or so years, and cut back as growth slows, to prevent obesity ¹².
• Pre-killed only. Retics often prefer live prey, but live prey can injure them, so feed pre-killed ¹³. Warm thawed prey in a sealed bag in warm water, never in a microwave ¹.
• Fowl. Save chicken as a last resort, for a snake that won't eat or needs to gain weight ¹.

Handling & temperament

Retics are said to be among the most intelligent snakes, and some appear to recognize and respond to their owners ¹. Temperament varies a lot, though. Some morphs, such as tigers, have a reputation for docility ¹, but caution is always needed ¹². Support the head, neck and body when you lift a snake ³. Wash your hands after handling or feeding: reptiles and frozen feeder rodents can carry Salmonella ¹⁰.

Health

Common issues

• Respiratory disease, such as pneumonia, usually from inadequate heat gradients. Early signs are wheezing and holding the head up ¹.
• Facial injuries and mouth rot from rubbing and pushing against the enclosure ¹.
• Inclusion body disease (IBD), a serious reptarenavirus infection of pythons and boas ⁶. Most exposed retics die of it, but some carry it for years ¹. It spreads through shared enclosures, breeding and mites. Never keep boas and pythons in the same cage ¹.
• Snake mites. Mites can ride on your clothes and skin between snakes, so wash and change between collections ¹.
• Obesity ¹².

When to see a vet

Contact your exotics vet promptly if you see a foamy or cheesy discharge from the mouth or throat ¹. Many respiratory cases caught early resolve once the heat gradient is fixed, but some need antibiotics ¹. Open-mouth breathing or an unresponsive snake is an emergency ¹¹.

Breeding overview

Breeding giant snakes multiplies every safety and housing problem above, and Novel Fauna does not recommend it for private keepers.

Females mature at about 3.5 to 5 years and males at about 3 to 5 years ⁵. Females lay eggs and guard them ⁵.

Genetics & morphs

Breeders have produced dozens of morphs, most of which aren't found in the wild ¹. Popular ones include tiger and super tiger, which have reduced, striped patterns and a reputation for docility, and three forms of albino (lavender, white and purple) ¹. Dwarf retics come in as many morphs as full-size animals. Many dwarf males stay under 8 feet and females under 12 feet ¹.

Legal & ethics

• U.S. federal law. The reticulated python has been listed as injurious wildlife under the Lacey Act since April 9, 2015 ⁷. Importing it into the United States is prohibited ⁸. In 2017 a federal appeals court ruled that the Lacey Act does not ban moving listed species between states within the continental U.S. ⁸. Shipments between the continental U.S. and Hawaii, Washington D.C., Puerto Rico or U.S. possessions are still prohibited ⁸. Many states and cities set their own rules, so check before you buy or move one.
• CITES. Malayopython reticulatus is listed on CITES Appendix II ⁹.
• Choose captive-bred. Millions of wild retics have been exported for the skin trade ⁴. Captive-bred animals also tend to be calmer ¹.

Sources

1. Reticulated Python · PetMD
2. Snakes · VCA Animal Hospitals
3. Basic Information Sheet: Boas and Pythons · LafeberVet
4. Malayopython reticulatus · The Reptile Database
5. Python reticulatus (Reticulated Python) · Animal Diversity Web, University of Michigan
6. Common Diseases of Pet Snakes · VCA Animal Hospitals
7. Summary of Species Currently Listed as Injurious Wildlife under (18 U.S.C. 42) Lacey Act · U.S. Fish and Wildlife Service
8. Implementation of the D.C. Circuit Court Decision in USARK v. Zinke · U.S. Fish and Wildlife Service
9. CITES listing: Malayopython reticulatus · Species+ (UNEP-WCMC and CITES Secretariat)
10. Salmonella, Feeder Rodents, and Pet Reptiles and Amphibians · U.S. Food and Drug Administration
11. When Should My Reptile See a Veterinarian? · Tree of Life Exotic Pet Medical Center

Last reviewed 2026-10-24 by Novel Fauna. This guide is general husbandry information, not veterinary advice. When an animal is sick, see a veterinarian experienced with exotic animals.

Revision history

1. 2026-10-24 Library complete: 20 more cited guides (70 total), Invertebrates group, care targets migration 0020, source title fixes 5cf06a2

Evidence grades: Novel Fauna editorial: source classification, not yet expert-reviewed, 2026-10-25. What the grades mean.

Report an issue