Atractus clarki
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~30% in a week ~60%
Atractus clarki, Clark's ground snake, is a rare species of snake in the family Colubridae. It is one of only five species of the very diverse (>150 species) genus Atractus that enters political North America. The species can be found in extreme southern Panama, the Pacific coast of Colombia and northwestern Ecuador. The species was first collected in 1938 from Santa Cruz de Cana, a 16th century gold mine on the eastern flank of the Serranía de Pirre mountains close to the Colombian border. A second specimen from adjacent Colombia was collected in 1919 but not correctly identified until 2003. The species is now known from numerous records in Ecuador and Colombia.
Atractus clarki is a small, nocturnal species that preys mainly on soil-dwelling invertebrates like earthworms. This snake is characterized by its brown dorsal pattern and lighter ventral side, with a bright red collar around its neck and head that they rely on as a defense tactic towards predators. Atractus clarki may represent a relatively ancestral form based on the shape of its reproductive organs. The specific physical appearance of Atractus clarki differs between male and female. Females... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Farallones de Cali National Natural Park | 🇨🇴 Colombia |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Clark's Ground Snake sighting in Farallones de Cali National Natural Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 7th most-seen of the 13 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
March
In that month about 30% of wildlife watchers report a Clark's Ground Snake in Farallones de Cali National Natural Park on a given day, against under 5% in May–June and August–February, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Clark's Ground Snake sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Only Farallones de Cali National Natural Park, in our data
Farallones de Cali National Natural Park is the only park on Wallace's Line with enough records to rate Clark's Ground Snake sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Clark's Ground Snake is recorded against all the reptiles logged in Farallones de Cali National Natural Park (6 verified sightings from 2019 to 2026), 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.
