Red-tailed Green Ratsnake
Gonyosoma oxycephalum
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassSquamata
- FamilyColubridae (Colubrid Snakes)
- GenusGonyosoma (Redtail Rat Snakes)
- SpeciesGonyosoma oxycephalum (Red-tailed Green Ratsnake)
About the Red-tailed Green Ratsnake
Gonyosoma oxycephalum, known commonly as the arboreal ratsnake, the red-tailed green rat snake, and the red-tailed racer, is a species of snake in the family Colubridae. The species is endemic to Southeast Asia. It was first described by Friedrich Boie in 1827.
G. oxycephalumm is found in Indonesia (Bangka, Belitung, Java, Kalimantan/Borneo, Karimata, Legundi, Lombok, Mentawai islands, Natuna islands, Nias, Panaitan, Riau archipelago, Sebuku, Sumatra, Tambelan archipelago), Malaysia (Malaya and East Malaysia, Pulau Tioman ?),
Singapore Island, Penang Island, India (Andaman Islands), Myanmar, Thailand (incl. Phuket), Cambodia, Laos, Vietnam, Philippine Islands (Balabac, Bohol, Catanduanes, Lubang, Luzon, Negros, Palawan, Sulu Archipelago, Panay).
The type locality is Indonesia: Java (F. Boie, 1827). G. oxycephalum is a robust powerful snake, with wide smooth scales on its belly that are ideal for climbing trees and across branches. It has smaller, smooth scales on its back, which is usually bright green or light green and may have a black net-like pattern. A gray-colored morph with a yellow head exists in Panay, in the Philippines.
As some of its... Wikipedia →
Closest Relatives at Sepilok
Paradise Flying Snake
Chrysopelea paradisi
Gray Bronzeback
Dendrelaphis caudolineatus
Brown Whip Snake
Dryophiops rubescens
Gold-ringed Cat Snake
Boiga dendrophila
Brown Rat Snake
Ptyas fusca
Blue-necked Keelback
Rhabdophis rhodomelas
(Eight-) Striped Kukri Snake
Oligodon octolineatus
Oriental Whipsnake
Ahaetulla prasina
Dog-toothed Cat Snake
Boiga cynodon
Samarinda Reed Snake
Calamaria hilleniusi
Orange-bellied Snake
Gongylosoma baliodeira
Black Copper Rat Snake
Coelognathus flavolineatus
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Sok National Park | 🇹🇭 Thailand | |
| 2 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 3 | Sepilok | 🇲🇾 Malaysia | |
| 4 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 5 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 6 | Kinabalu Park | 🇲🇾 Malaysia | |
| 7 | Khao Yai National Park | 🇹🇭 Thailand | |
| 8 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 9 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 10 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 11 | Khao Luang National Park | 🇹🇭 Thailand |
Quick answers
What are the chances of seeing a Red-tailed Green Ratsnake in Sepilok?
About 20% of wildlife watchers report a Red-tailed Green Ratsnake sighting in Sepilok, based on 21 verified sightings from GBIF citizen-science data.
When is the best time to see Red-tailed Green Ratsnake in Sepilok?
April has the highest sighting rate for Red-tailed Green Ratsnake in Sepilok in our monthly data.