Ptyas carinata
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~10% in a week ~30%
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 →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Sok National Park | 🇹🇭 Thailand | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kuala Lumpur | 🇲🇾 Malaysia | |
| 2 | Singapore | 🇸🇬 Singapore |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | National Zoo of Malaysia | 🇲🇾 Malaysia |
With luck
About 10% of wildlife watchers report a Keeled Rat Snake sighting in Singapore on a given day, based on 46 verified sightings from GBIF citizen-science data. It is the 38th most-seen of the 64 reptiles we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
April, August and December
In those months about 10% of wildlife watchers report a Keeled Rat Snake in Singapore on a given day, against under 5% in January–March, May–July and September–November, the lowest months.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Keeled Rat Snake sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Among the best
Of the 2 cities where we can rate Keeled Rat Snake sightings, Singapore ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Kuala Lumpur (Malaysia, about 10%).
GBIF citizen-science records
It is estimated from how often the Keeled Rat Snake is recorded against all the reptiles logged in Singapore (46 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
