Dhaman
Ptyas mucosa
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyColubridae (Colúbrids)
- GenusPtyas (Asian Rat Snakes)
- SpeciesPtyas mucosa (Dhaman)
Ptyas mucosa, commonly known as the Oriental rat snake, or Indian rat snake, is a common non-venomous species of colubrid snake found in parts of South and Southeast Asia. These are large snakes. Typical mature total length is around 1.5 to 1.95 m (4 ft 11 in to 6 ft 5 in) though some exceed 2 m (6 ft 7 in). The record length for this species was 3.7 m (12 ft 2 in), second only to their cousin Ptyas carinata among living colubrid snakes. Despite their large size, oriental ratsnakes are usually quite slender with even a specimen of 2 m (6 ft 7 in) commonly measuring 4 to 6 cm (1.6 to 2.4 in) only around in diameter. Furthermore, the average weight of ratsnakes caught in Java was around 877 to 940 g (1.933 to 2.072 lb), though larger males of over 2.3 m (7 ft 7 in) (which average mildly larger of the two sexes in the species) may easily weigh over 2.5 kg (5.5 lb). Wikipedia →
10–20% of wildlife watchers report a Dhaman sighting in Sinharaja Forest Reserve, based on 13 days of visitor records from GBIF citizen-science data.
Closest Relatives at Sinharaja Forest Reserve
Green Vine Snake
Ahaetulla nasuta
Boulenger's Keelback
Fowlea asperrimus
Stripe-Tailed Bronzeback
Dendrelaphis caudolineolatus
Ceylon Wolf Snake
Lycodon carinatus
Schokar's bronzeback
Dendrelaphis schokari
Beddome's Cat Snake
Boiga beddomei
Duméril's Kukri Snake
Oligodon sublineatus
Barnes' Cat Snake
Boiga barnesii
Sri Lanka Cat Snake
Boiga ceylonensis
Blossom Krait
Rhabdophis ceylonensis
Split Keelback
Atretium schistosum
Templeton's Kukri Snake
Oligodon calamarius
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
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 | Probability |
|---|---|---|---|
| 1 | Satpura National Park | 🇮🇳 India | |
| 2 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 3 | Yala National Park | 🇱🇰 Sri Lanka | |
| 4 | Minneriya National Park | 🇱🇰 Sri Lanka | |
| 5 | Chitwan National Park | 🇳🇵 Nepal | |
| 6 | Sundarbans National Park | 🇮🇳 India | |
| 7 | Bandhavgarh National Park | 🇮🇳 India | |
| 8 | Royal Bardia National Park | 🇳🇵 Nepal | |
| 9 | Periyar National Park | 🇮🇳 India | |
| 10 | Kanha National Park | 🇮🇳 India | |
| 11 | Mudumalai National Park | 🇮🇳 India | |
| 12 | Wilpattu National Park | 🇱🇰 Sri Lanka | |
| 13 | Nagarhole National Park | 🇮🇳 India | |
| 14 | Ba Be National Park | 🇻🇳 Vietnam | |
| 15 | Kaziranga National Park | 🇮🇳 India | |
| 16 | Keoladeo National Park | 🇮🇳 India | |
| 17 | Jim Corbett National Park | 🇮🇳 India | |
| 18 | Bandipur National Park | 🇮🇳 India | |
| 19 | Ranthambore National Park | 🇮🇳 India | |
| 20 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 21 | Taroko National Park | 🇹🇼 Taiwan | |
| 22 | Khao Yai National Park | 🇹🇭 Thailand |
Quick answers
What are the chances of seeing a Dhaman in Sinharaja Forest Reserve?
About 18% of wildlife watchers report a Dhaman sighting in Sinharaja Forest Reserve, based on 13 days of visitor records from GBIF citizen-science data.
When is the best time to see Dhaman in Sinharaja Forest Reserve?
October has the highest sighting rate for Dhaman in Sinharaja Forest Reserve in our monthly data.