Achalinus spinalis
Silhouette: Sin Syue Li (photograph) · PhyloPic
In 3 days ~10% in a week ~20%
Achalinus spinalis, commonly known as Peters' odd-scaled snake, the Japanese odd-scaled snake, the Japanese ground snake or the grey burrowing snake, is a species of snake in the family Xenodermidae. The species is found in northern Vietnam, Japan (Kyūshū, Honshū, the Ryukyu Islands, Koshiki, Tokuno-shima: Kametoku and Inokawa), and central China (east to Fujian, west to Yunnan and Sichuan, and north to Gansu and Shaanxi, and in Zhejiang, Jiangxi, Jiangsu and Hubei) at an elevation of 1,230 m. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tokyo | 🇯🇵 Japan |
No species of the same family or order lives in Tokyo, so these are its closest relatives here: other reptiles.
Rare
Under 5% of wildlife watchers report a Peters' Odd-scaled Snake sighting in Tokyo on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 15th most-seen of the 15 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Peters' Odd-scaled Snake in Tokyo on a given day, so our monthly data shows no clear season.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Peters' Odd-scaled Snake sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Only Tokyo, in our data
Tokyo is the only city on Wallace's Line with enough records to rate Peters' Odd-scaled 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 Peters' Odd-scaled Snake is recorded against all the reptiles logged in Tokyo (5 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.
