Cochranella granulosa
Silhouette: Dmitry Bogdanov (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~20% in a week ~30%
Cochranella granulosa (common name: grainy Cochran frog, Spanish: ranita de cristal) is a species of frog in the family Centrolenidae. It is found in Costa Rica, Honduras, Nicaragua, and Panama. Cochranella granulosa is a nocturnal, arboreal frog found in humid lowland and montane forests. It is typically found in vegetation near streams. Eggs are deposited on vegetation over streams, and the tadpoles drop to water upon hatching. This species is negatively impacted by habitat loss (deforestation) and water pollution. Wikipedia →
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Costa Rica · 2023
© Chris Harrison · XC893963 · CC BY-NC-SA 4.0
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Costa Rica · 2026
© Emmanuel Rodríguez Rojas · iNaturalist · CC BY-NC 4.0
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Panama · 2022
© Hubert Szczygieł · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 2 | Manuel Antonio National Park | 🇨🇷 Costa Rica | |
| 3 | Soberanía National Park | 🇵🇦 Panama | |
| 4 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 5 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | California Academy of Sciences | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Grainy Cochran Frog sighting in Arenal Volcano National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 36th most-seen of the 39 amphibians we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
February–May and July
In those months about 10% of wildlife watchers report a Grainy Cochran Frog in Arenal Volcano National Park on a given day, against under 5% in June and August–January, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Grainy Cochran Frog 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.
Among the best
Of the 5 parks where we can rate Grainy Cochran Frog sightings, Arenal Volcano National Park ranks 5th at about 10%, level with the leaders once rounded. The best odds are in Tenorio Volcano National Park (Costa Rica, about 10%), Manuel Antonio National Park (Costa Rica, about 10%) and Soberanía National Park (Panama, about 10%).
Same family: Centrolenidae
The closest relatives of the Grainy Cochran Frog that you can see in Arenal Volcano National Park (family Centrolenidae, Glass Frogs) are Emerald Glass Frog (about 20%), Reticulated Glass Frog (about 20%) and Chiriqui Glass Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Grainy Cochran Frog is recorded against all the amphibians logged in Arenal Volcano National 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.
