Geophis brachycephalus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~40%
Geophis brachycephalus, also known as the Costa Rican earth snake, is a snake of the colubrid family. It is found in Costa Rica and Panama. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 2 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | La Amistad International Park (Panama) | 🇵🇦 Panama |
With luck
About 10% of wildlife watchers report a Gray Earth Snake sighting in Arenal Volcano National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 46th most-seen of the 64 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 Gray Earth Snake in Arenal Volcano National Park on a given day, against under 5% in January–February, April, June, August and October, the lowest months. That is one of Arenal Volcano National Park's wettest months, with about 500 mm of rain against 140 mm in April.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Gray Earth 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.
Among the best
Of the 3 parks where we can rate Gray Earth Snake sightings, Arenal Volcano National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Braulio Carrillo National Park (Costa Rica, about 10%).
Same family: Colubridae
The closest relatives of the Gray Earth Snake that you can see in Arenal Volcano National Park (family Colubridae, Colubrid Snakes) are Ornate Cat-eyed Snake (about 30%), Cloudy Snail-eating Snake (about 20%) and Blunthead Tree Snake (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Gray Earth Snake is recorded against all the reptiles logged in Arenal Volcano National Park (10 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.
