Incilius melanochlorus
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~40% in a week ~70%
Incilius melanochlorus, formerly Bufo melanochlorus, is a mid-sized species of toad with a crested head in the family Bufonidae. It is primarily distinguished by its very long first finger with respect to the other fingers. It is found in southern Nicaragua, in the northern Cordillera Central (central highlands) and on the Atlantic slopes of eastern Costa Rica, and in western Panama.
Frank and Ramus (1995) give it the common name dark green toad, Panamanian herpetologists Jaramillo and Ibáñez (2009) use wet forest toad or west forest toad according to Darrel R. Frost (likely a misspelling). A local Spanish name from Costa Rica specifically for this species is sapo Costaricense de la selva, but it also just known as sapo.
The first article about this species was published in 1875 by Edward Drinker Cope who wrote of the toad as a particular but unnamed variety of Bufo valliceps from eastern Costa Rica. It was described as a novel species in its own right in 1877 by Cope under the name B. melanochlorus. The holotype is a specimen (undesignated in Cope's original publication, but thought to be USNM30592) taken in Limón Province sometime before 1877... Wikipedia →
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Costa Rica · 2022
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Costa Rica · 2026
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| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 2 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 4 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica |
Possible
About 20% of wildlife watchers report a Wet Forest Toad sighting in Arenal Volcano National Park on a given day, based on 51 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 15th most-seen of the 39 amphibians 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.
June and September
In those months about 30% of wildlife watchers report a Wet Forest Toad in Arenal Volcano National Park on a given day, against about 10% in January–April and October, the lowest months.
Between 6 and 9 pm
Across all the parks we cover, that three-hour window holds the most Wet Forest Toad 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.
Yes
Of the 4 parks where we can rate Wet Forest Toad sightings, Arenal Volcano National Park has the highest daily chance: about 20%. Next come Tenorio Volcano National Park (Costa Rica, about 20%) and Braulio Carrillo National Park (Costa Rica, about 10%).
Same family: Bufonidae
The closest relatives of the Wet Forest Toad that you can see in Arenal Volcano National Park (family Bufonidae, True Toads) are Giant Marine Toad (about 40%) and Leaf Litter Toad (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Wet Forest Toad is recorded against all the amphibians logged in Arenal Volcano National Park (51 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.
