Tomodon dorsatus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~40%
Tomodon is a monotypic genus of snake in the subfamily Dipsadinae of the family Colubridae. The genus contains the sole species Tomodon dorsatus, also known commonly as the pampas snake, which is endemic to South America.
The eye of Tomodon dorsatus has a round pupil. The lining of the mouth is black. The last maxillary tooth is enlarged and grooved. There are seven upper labials. The smooth dorsal scales are arranged in 17 rows on the neck and at midbody, and reduced to 15 rows anterior to the cloaca.
Tomodon dorsatus is found in northeastern Argentina, central and southeastern Brazil, Paraguay, and Uruguay. The preferred natural habitat of Tomodon dorsatus is forest. Tomodon dorsatum preys exclusively upon molluscs. The mode of reproduction of Tomodon dorsatus has been described as viviparous and as ovoviviparous. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | São Paulo | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Pampas Snake sighting in São Paulo on a given day, based on 31 verified sightings from GBIF citizen-science data. It is the 7th most-seen of the 23 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.
November
In that month about 20% of wildlife watchers report a Pampas Snake in São Paulo on a given day, against under 5% in February–April and June–September, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Pampas Snake sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only São Paulo, in our data
São Paulo is the only city on Wallace's Line with enough records to rate Pampas Snake sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Colubridae
The closest relatives of the Pampas Snake that you can see in São Paulo (family Colubridae, Colubrid Snakes) are Brazilian Slug-eating Snake (about 10%), Military Ground Snake (about 10%) and Guibe's Flame Snake (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pampas Snake is recorded against all the reptiles logged in São Paulo (31 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.
