Physignathus cocincinus
Silhouette: Michael Scroggie · PhyloPic
In 3 days ~20% in a week ~40%
Physignathus cocincinus is a species of agamid lizard native to southern China and mainland Southeast Asia. It is commonly known as the Chinese water dragon, Indochinese water dragon, Asian water dragon, Thai water dragon, or green water dragon.
Chinese water dragons are large diurnal lizards adapted for dense subtropical forests replete with unpolluted streams. They are semi-arboreal, roosting at night on branches overlooking streams, which offer an escape route when the lizards are disturbed. Arthropods are their main source of food, though worms, snails, vertebrates, and plants make up a notable portion of the diet as well. Males are territorial towards each other and bear display features such as crests and jowls. Females are oviparous and reproduce sexually in the wild, though at least one captive Chinese water dragon is known to have reproduced via parthenogenesis. Physignathus cocincinus is related to Australasian lizards in the subfamily Amphibolurinae. One amphibolurine, the Australian water dragon (Intellagama lesuerii) is so anatomically and ecologically similar to Physignathus cocincinus that it was once (erroneously) placed in the same genus.
Feral populations introduced to Hong Kong and Taiwan flourish in high densities despite countermeasures in the latter territory. Their populations are also stable (albeit not widespread) in protected areas of Thailand. However, in the rest of their native range, Chinese water dragons have seen sharp population declines in recent decades. They are listed as a Vulnerable species at risk of extinction in the future, based on current trends. The largest threat to the species is overharvesting for meat and the pet trade. Their meat is in high demand in Vietnam, and captive breeding is currently incapable of replacing wild collection by hunters and poachers. Due to their charismatic appearance, captured Chinese water dragons are sold as pets for both local and international markets. Yearly exports to the European Union and the United States number in the tens of thousands, all of which are taken from wild populations. Habitat loss is another source of pressure, as undisturbed streamside forest is converted into cropland or subjected to illegal logging and other human activities. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand | |
| 2 | Cat Tien National Park | 🇻🇳 Vietnam |
With luck
About 10% of wildlife watchers report a Water Dragon sighting in Tuen Mun on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 20th most-seen of the 21 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
March–April and August–November
In those months about 10% of wildlife watchers report a Water Dragon in Tuen Mun on a given day, against under 5% in May–July and December–February, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Water Dragon sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
2nd of 2
Of the 2 cities where we can rate Water Dragon sightings, Tuen Mun ranks 2nd at about 10%. The best odds are in Hong Kong (China, about 30%).
GBIF citizen-science records
It is estimated from how often the Water Dragon is recorded against all the reptiles logged in Tuen Mun (7 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.
