Ichthyophis kohtaoensis
Silhouette: Dmitry Bogdanov (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~40% in a week ~70%
The Koh Tao Island caecilian (Ichthyophis kohtaoensis) is a species of amphibian in the family Ichthyophiidae found in Cambodia, Laos, Myanmar, Thailand, and Vietnam. Also known as the Ichthyophis bannanicus, the Banna caecilian, it is also found in southern China.
Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, rivers, intermittent rivers, swamps, freshwater marshes, intermittent freshwater marshes, plantations, rural gardens, urban areas, heavily degraded former forests, irrigated land, and seasonally flooded agricultural land. It is threatened by habitat loss.
The scientific name refers to Ko Tao Island in the Gulf of Siam, where the type specimen was collected. The mitotic karyotypes of both the female and male Koh Tao caecilians have 21 pairs of chromosomes, although in a study performed by Nussbaum and Treisman, it was found that there was an inconsistent report of chromosomes. While they all may have the 21 chromosome pairs, there was a study that found they have 18 metacentric, 4 submetacentric, and 20 telocentric chromosomes while another study had found 16 metacentric, 6 submetacentric... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 2 | Khao Sok National Park | 🇹🇭 Thailand |
No species of the same family or order lives in Khao Sok National Park, so these are its closest relatives here: other amphibians.
With luck
About 10% of wildlife watchers report a Koh Tao Caecilian sighting in Khao Sok National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 17th most-seen of the 21 amphibians we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
March
In that month about 30% of wildlife watchers report a Koh Tao Caecilian in Khao Sok National Park on a given day, against under 5% in June and August–January, the lowest months. That is one of Khao Sok National Park's driest months, with about 55 mm of rain against 280 mm in October.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Koh Tao Caecilian sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Koh Tao Caecilian sightings, Khao Sok National Park ranks 2nd at about 10%. The best odds are in Doi Inthanon National Park (Thailand, about 20%).
GBIF citizen-science records
It is estimated from how often the Koh Tao Caecilian is recorded against all the amphibians logged in Khao Sok National Park (6 verified sightings from 2019 to 2026), 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.
