Keeled Rat Snake
Ptyas carinata
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassSquamata
- FamilyColubridae (Colubrid Snakes)
- GenusPtyas (Asian Rat Snakes)
- SpeciesPtyas carinata (Keeled Rat Snake)
About the Keeled Rat Snake
Ptyas carinata, commonly known as the keeled rat snake, also called King koros is a species of colubrid snake. It is found in Indonesia, Myanmar, Malaysia, Thailand, Philippines, Cambodia, Vietnam, Laos and Singapore. This little known species is probably the largest extant species in the diverse colubrid family that includes just over half of living snake species. Known adult lengths of snakes of this species in Taiwan measured anywhere from 1.21 to 2.75 m (4 ft 0 in to 9 ft 0 in). However, the reportedly maximum size was about 4 m (13 ft 1 in). Males reportedly average slightly larger than females. They are probably opportunistic predators on a variety of prey, such as rodents, though adult lizards are thought to be significant prey in Indonesia.
Media related to Ptyas carinata at Wikimedia Commons Photo by Noel Thomas - MacRitchie North Central Catchment Nature Reserve, Singapore Photo by John Varigos - Mt Rimau, Sipitang - Malaysia Species of Doi Suthep-Pui National Park
Ptyas carinata in Thailand Wikipedia →
Closest Relatives at Sepilok
Brown Rat Snake
Ptyas fusca
Paradise Flying Snake
Chrysopelea paradisi
Gray Bronzeback
Dendrelaphis caudolineatus
Red-tailed Green Ratsnake
Gonyosoma oxycephalum
Brown Whip Snake
Dryophiops rubescens
Gold-ringed Cat Snake
Boiga dendrophila
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
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 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 3 | Khao Luang National Park | 🇹🇭 Thailand | |
| 4 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 5 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 6 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 7 | Sepilok | 🇲🇾 Malaysia |