Imantodes inornatus
Silhouette: PhyloPic
In 3 days ~40% in a week ~60%
Imantodes inornatus, the western tree snake, is a species of colubrid snake native to Central America. It can be found from Guatemala to Ecuador. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 2 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 4 | Gandoca-Manzanillo Wildlife Refuge | 🇨🇷 Costa Rica | |
| 5 | Manuel Antonio National Park | 🇨🇷 Costa Rica | |
| 6 | Soberanía National Park | 🇵🇦 Panama |
With luck
About 10% of wildlife watchers report a Western Tree Snake sighting in Arenal Volcano National Park on a given day, based on 32 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 25th most-seen of the 64 reptiles we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
April–June, September and November
In those months about 20% of wildlife watchers report a Western Tree Snake in Arenal Volcano National Park on a given day, against under 5% in March and October, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Western Tree Snake sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
3rd of 6
Of the 6 parks where we can rate Western Tree Snake sightings, Arenal Volcano National Park ranks 3rd at about 10%. The best odds are in Braulio Carrillo National Park (Costa Rica, about 20%) and Tenorio Volcano National Park (Costa Rica, about 20%).
GBIF citizen-science records
It is estimated from how often the Western Tree Snake is recorded against all the reptiles logged in Arenal Volcano National Park (32 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.
