I'm sure I've missed a few locals - will add more when I come across them.
Green Tree Pythons are absolutely gorgeous snakes. They start out most commonly either red or yellow as neonates, and with time they go through an amazing ontogenic color change. They are an arboreal species and make great display animals. They are known to have feisty temperaments, but it is possible to handle them once tamed down. Some localities have better reputations than others, for example Sorongs are traditionally tamer than Biaks.
Neonate GTP's are usually between 8-10 inches long. They are tiny and very delicate. It is best to avoid handling them until they grow some. Adults are usually between 4-6ft fully matured.
20+ years in captivity.
As I mentioned before, GTP's are known for having feisty attitudes. They are known to be snappy and just not that great for handling. However, they can be tamed down if you are patient. Some locals are better temperament wise than others. Sorongs and Arus are generally nicer than Biaks.
GTP's do best on a weekly feeding regimen. Neonates should be started on pinky mice. I also want to stress that you should never force feed a baby GTP. They are so small and fragile compaired to other python hatchlings that it should be avoided at all costs. As the snake grows, so should the prey. It is recommended to get your snake started on f/t prey as soon as possible. Some adult GTP's get large enough to be put on rats.
This species has a lower heat requirement than most pythons. They should have a basking spot of about 87F and an ambient temperature between 75-82F. They can handle a nighttime drop to the low 70s.
Humidity is very important to this species. They should be given a high humidity of about 60-90% for part of the day, but it is essential that they are given a dry out period everyday. Humidity should be kept between 40-70% most of the time. Too high or too low of humidity can cause major issues with respiratory and shedding.
Green tree pythons can be kept in many different setups. One of the most effective enclosures would be an arboreal tub or professional enclosure (Animal Plastics, Vision, etc). They can also be kept in aquariums if you can keep the temps/humidity right. These animals prefer height over floor space. They require a perch.
Green tree pythons are more challenging to breed than most species. Breeding age occurs at 2-4 years old, females need longer to mature than males. Females should be at least 2 lbs before trying to breed. All animals should be in perfect condition before attempting any breeding. Breeding season is usually from Aug-Dec. Temperatures should be dropped to the upper 60s. The temperature change should be gradual until you get to about 67-68F. The animals need to be cooled for 1-3 weeks before introduction. Introduce the pair. You should return to normal temperatures in the daytime throughout the breeding season. Keep dropping the nighttime temperature until you see the female ovulate. At this time you can put her back on regular heat 24/7. The male can be removed at this time. Green tree pythons traditionally breed for 4-6 weeks. After you see her ovulate you can expect her to have her pre-lay shed 25 days later. Expect eggs 14-21 days after her shed. The female should be given a nest box to lay her eggs in. Clutch size ranges from 10-30 eggs, with 20 being average. Incubate at 87-88F, the eggs should hatch in approximately 50 days.
Green tree pythons are not for everyone. They aren't a beginner species, but they are rewarding and beautiful captives when cared for correctly.