Calamaria septentrionalis
Silhouette: Jessica Tingle · PhyloPic
In 3 days ~20% in a week ~50%
Calamaria septentrionalis is a species of snake of the family Colubridae. It is commonly known as the Hong Kong dwarf snake. The snake is found in China and Vietnam. Species Calamaria septentrionalis at The Reptile Database Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hangzhou | 🇨🇳 China |
With luck
About 10% of wildlife watchers report a Northern Reed Snake sighting in Hangzhou on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 10th most-seen of the 14 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
June
In that month about 20% of wildlife watchers report a Northern Reed Snake in Hangzhou on a given day, against under 5% in August to March, the lowest months. That is one of Hangzhou's wettest months, with about 250 mm of rain against 65 mm in December.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Northern Reed Snake sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Hangzhou, in our data
Hangzhou is the only city on Wallace's Line with enough records to rate Northern Reed Snake sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Colubridae
The closest relatives of the Northern Reed Snake that you can see in Hangzhou (family Colubridae, Colubrid Snakes) are Red-banded Snake (about 10%), Beauty Rat Snake (about 10%) and Big-Eyed Ratsnake (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Northern Reed Snake is recorded against all the reptiles logged in Hangzhou (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.
