Common Names: Jansens Ratsnake, Celebes Black Tailed Ratsnake
Scientific Name: Gonyosoma jansenii
First Described: BLEEKER, 1858
Adult Size: 170-180cm
Temperament: Shy and defensive
Temperature & Humidity Range: Provide a thermal gradient of between 29°C (84°F) to 25°C (77°F) Required humidity is between 80-90%, provide a humid hide and mist the enclosure with tepid water twice a day.
Brumation: No brumation needed
Reproduction: Gonyosoma jansenii appears to only produce one clutch per year with an average of 5 eggs in each which hatch from 123-125 days at an incubation temperature of between 27-29°C
Known Mutations: Melanistic
Melanistic, all black Gonyosoma jansenii occur on the island of Salayar, it is not not known whether it is a genetic (eg: simple recessive) trait, as the unique characteristics of this island form have bred to like so far.
Captive Bred Localities: Salayer,
Natural History: A montane, semi arboreal species, it is found in rainforests at an altitude of between 100 and 1000m. In the wild the diet of Gonyosoma jansenii consists of, Mice, Rats, Birds, Squirrels & Bats.
Native To: Gonyosoma jansenii appears to be isolated to its own specific island in Indonesia. The Black Tailed G. jansenii is found only on the Indonesian island of Sulawesi / Celebes (Schulz 1996), and the Black (Melanistic) G.jansenii appears to be isolated to the small island of Salayar just off the southern coast of Sulawesi.
- Clicking the snake icons will bring up an information bubble with more information about the species occurance in that area.
- Clicking anywhere on the map will bring up a pop up window with the elevation at that point.
IUCN Red List: Not Listed