Opisthotropis lateralis
In 3 days ~10% in a week ~20%
Opisthotropis lateralis, the Tonkin mountain keelback, is a species of natricine snake found in Vietnam and China. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hong Kong | 🇨🇳 China |
Rare
Under 5% of wildlife watchers report a Bicoloured Stream Snake sighting in Hong Kong on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 37th most-seen of the 43 reptiles we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
February and September–October
In those months about 10% of wildlife watchers report a Bicoloured Stream Snake in Hong Kong on a given day, against under 5% in March–August and November–January, the lowest months.
Only Hong Kong, in our data
Hong Kong is the only city on Wallace's Line with enough records to rate Bicoloured Stream Snake sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Bicoloured Stream Snake is recorded against all the reptiles logged in Hong Kong (6 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.
