GREEN TREE PYTHON
Description
The green tree python is
characterized by a relatively slim body. The relatively long tail accounts for
about 14% of the total length. The head is large and clearly defined from the
neck. The muzzle is large and angular. The body is triangular in cross section
with a visible spine. The species usually reaches a total length of 150-180 cm
(4.9-5.9 ft), but large females may reach 200 cm (6.6 ft). The size
also varies depending on the region of origin. The weight is highly dependent
upon the nutritional status of the animal. Males can weigh about 1100-1400 g
(2.4-3.1 lb), females up to 1,600 g (3.5 lb). Especially large
specimens up to 2,200 g (4.9 lb) are females, which like most snakes
are slightly larger and heavier than males.
Geographic range
They are found in Indonesia
(Misool,
Salawati,
Aru Islands,
Schouten
Islands, most of Western New Guinea), Papua New
Guinea (including nearby islands from sea level to 1,800 m
elevation, Normanby Island and the
d'Entrecasteaux Islands) and Australia (Queensland along the east coast of the Cape York Peninsula). The type locality given is
"Aroe-eilanden" (Aru Islands, Indonesia).[1]
This species is sympatric
with M. spilota
and the two often compete in the same ecological niche.
Habitat
Its main habitat is in
rainforests, bushes, shrubs and trees.
Conservation
The largest threat to the
species is habitat destruction due to logging of forests.
Behavior
Primarily arboreal, these
snakes have a particular way of resting in the branches of trees; they loop a
coil or two over the branches in a saddle position and place their head in the
middle. This trait is shared with the emerald tree boa, Corallus caninus, of South America. This
habit, along with their appearance, has caused people to confuse the two
species when seen outside their natural habitat.
Feeding
The diet consists mostly of small
mammals, such as rodents, and sometimes reptiles. This snake, like the emerald
tree boa, was thought to eat birds; however, Switak conducted field work on
this issue. In examining stomach contents of more than 1,000 animals, he did
not find any evidence of avian prey. Prey is captured by holding onto a branch
using the prehensile tail and striking out from an s-shaped position and
constricting the prey.
Reproduction
M.
viridis is oviparous,
laying 1-25 viable eggs per clutch. Breeding has never been reported from the
wild, however in captivity eggs are incubated and protected by the female.
Hatchlings are lemon-yellow with broken stripes and spots of purple and brown,
or golden or orange-red. For yellow individuals at Iron Range National Park,
Australia, the color change occurred over 5-10 days when individuals were 58-60
cm (22.8-23.6 in) long, which corresponds to about a year old. Colour change
for red juveniles has not been observed in the wild.
Captivity
These snakes are often bred
and kept in captivity, although they are usually considered an advanced species
due to their specific care requirements; once these are met, they thrive in
captivity. Wild-caught individuals often carry parasites and always tame down,
so have even further care requirements. The majority of captive-bred
individuals, though, are very docile. With the development of artificial incubation,
this species became much more available in captivity. The most common method
used was developed by Robert Worrell in the mid 1990s. It simply involved using
a 50/50 ratio of vermiculite to water and just using a beverage cooler for an
incubator. This, combined with the focus on embryo placement, allowed for a
much higher hatch rate for this species in captivity. Later, Worrell's
observation of ovulation allowed the average hobbyist to determine when
oviposition would take place, as well as the outcome of the eggs. Green tree
pythons lay their eggs roughly 40 days after ovulation, with the time extended
up to a week when the animals are maintained in a cooler environment.
The caging for these animals
is a bit more specific than the average python. As long as these requirements
are met, the animal becomes very low maintenance. They require a higher
relative humidity (60-80%) as well as a smaller fluctuation in temperatures
(80-85F/26.5-29.5C) than most. Shiloh Hawkesworth wrote an article for Reptiles
Magazine titled "Heat Seeker"
"Heat
Seeker" continuation going over these requirements. Among many
who have kept this species, the green tree python has a reputation for being a
furious reptile which will bite when provoked, but this is mainly limited to
imported animals. Captive-bred animals are among the most gentle of all the
python species.
A care sheet for this
species can be found on the Reptiles Magazine website. This "care
sheet" article was written by Rico Walder and Trooper Walsh.
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