Black-tailed Worm Snake

Black-tailed Worm Snake

Geophis talamancae

Silhouette: Alex Slavenko · PhyloPic

LCNTVUENEndangeredCR
Daily sighting probability ~10% · With luck
at Chirripó National Park

In 3 days ~40% in a week ~70%

12 Verified sightings at Chirripó National Park From 2019 to 2026
17 In all 2 parks
August Best month
🌙 Nocturnal When it's spotted

About the Black-tailed Worm Snake

Geophis talamancae is a snake of the colubrid family. It is found in Costa Rica and Panama. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Chirripó National Park 🇨🇷 Costa Rica
~10%
2 La Amistad International Park (Panama) 🇵🇦 Panama
<5%

Before you go

What are the chances of seeing a Black-tailed Worm Snake in Chirripó National Park?

With luck

About 10% of wildlife watchers report a Black-tailed Worm Snake sighting in Chirripó National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 8th most-seen of the 17 reptiles we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.

When is the best time to see a Black-tailed Worm Snake in Chirripó National Park?

April and August

In those months about 30% of wildlife watchers report a Black-tailed Worm Snake in Chirripó National Park on a given day, against under 5% in May–July and September–December, the lowest months.

What time of day is best to see a Black-tailed Worm Snake?

Between 7 and 10 pm

Across all the parks we cover, that three-hour window holds the most Black-tailed Worm Snake sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.

Is Chirripó National Park the best place to see a Black-tailed Worm Snake?

Yes

Of the 2 parks where we can rate Black-tailed Worm Snake sightings, Chirripó National Park has the highest daily chance: about 10%. Next come La Amistad International Park (Panama) (Panama, under 5%).

Which relatives of the Black-tailed Worm Snake live in Chirripó National Park?

Same family: Colubridae

The closest relatives of the Black-tailed Worm Snake that you can see in Chirripó National Park (family Colubridae, Colubrid Snakes) are South American Milksnake (about 20%), Fire-bellied Snake (about 10%) and Blunthead Tree Snake (about 10%), with each one's daily chance of a sighting.

Where does the Black-tailed Worm Snake sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Black-tailed Worm Snake is recorded against all the reptiles logged in Chirripó National Park (12 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.

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