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Emerald Glass Frog
Espadarana prosoblepon
Silhouette: Dmitry Bogdanov (vectorized by T. Michael Keesey) · PhyloPic
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassAmphibia (Amphibians)
- OrderAnura (Frogs and Toads)
- FamilyCentrolenidae (Glass Frogs)
- GenusEspadarana
- SpeciesEspadarana prosoblepon (Emerald Glass Frog)
In 3 days ~60% in a week ~90%
84 Verified sightings at Arenal Volcano National Park From 2019 to 2026
237 In all 9 parks
November Best month
🌙 Nocturnal When it's spotted
About the Emerald Glass Frog
Espadarana prosoblepon is a species of frog in the family Centrolenidae, commonly known as the emerald glass frog or Nicaragua giant glass frog. This species can be found in Ecuador, Colombia, Panama, Costa Rica, Nicaragua, and Honduras. Its natural habitats are lowland tropical forests and montane cloud forests. It is a nocturnal species occurring in low vegetation in mature forests only. It is not considered threatened overall by the IUCN although deforestation and pollution are potential threats, as is chytridiomycosis.
The word "prosoblepon" originates from the Greek words "proso" and "blepo", which respectively mean "forward, in front" and "see, look", and is thought to signify the frontal position of the eyes in the emerald glass frog.
Espadarana prosoblepon is listed as least concern according to IUCN in the red list category and criteria when it was assessed in 2020. It was listed as least concern because of its wide distribution, large population, and its improbable decline. The emerald glass frog has a lifespan of more than 5 years. It is physically described to be small, green, and may occasionally have dark spots on its back. It has a translucent... Wikipedia →
Sounds
Advertisement call0:22
Ecuador · 2018
© Marc Anderson · XC1078583 · CC BY-NC-ND 4.0
Recording0:20
Panama · 2025
© anuraots · iNaturalist · CC BY-NC 4.0
Recording0:19
Costa Rica · 2026
© carlos miguel solano · iNaturalist · CC BY-NC 4.0
Recent sightings of Emerald Glass Frog in Arenal Volcano National Park
LIVEiNaturalistGlobal Distribution
Parks Where Found
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chirripó National Park | 🇨🇷 Costa Rica | |
| 2 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Piedras Blancas National Park | 🇨🇷 Costa Rica | |
| 4 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 5 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 6 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 7 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 8 | Soberanía National Park | 🇵🇦 Panama | |
| 9 | La Amistad International Park (Panama) | 🇵🇦 Panama |
Cities Where Found
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San José | 🇨🇷 Costa Rica |
Zoos & Centres Where Found
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Monteverde Theme Park | 🇨🇷 Costa Rica |
Closest Relatives at Arenal Volcano National Park
Before you go
What are the chances of seeing an Emerald Glass Frog in Arenal Volcano National Park?
Possible
About 20% of wildlife watchers report an Emerald Glass Frog sighting in Arenal Volcano National Park on a given day, based on 84 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 11th most-seen of the 39 amphibians we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
When is the best time to see an Emerald Glass Frog in Arenal Volcano National Park?
January–February, April–May and November
In those months about 30% of wildlife watchers report an Emerald Glass Frog in Arenal Volcano National Park on a given day, against about 10% in September and October, the lowest months.
What time of day is best to see an Emerald Glass Frog?
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Emerald Glass Frog 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.
Is Arenal Volcano National Park the best place to see an Emerald Glass Frog?
2nd of 9
Of the 9 parks where we can rate Emerald Glass Frog sightings, Arenal Volcano National Park ranks 2nd at about 20%. The best odds are in Chirripó National Park (Costa Rica, about 30%).
Which relatives of the Emerald Glass Frog live in Arenal Volcano National Park?
Same family: Centrolenidae
The closest relatives of the Emerald Glass Frog that you can see in Arenal Volcano National Park (family Centrolenidae, Glass Frogs) are Reticulated Glass Frog (about 20%), Chiriqui Glass Frog (about 10%) and Ghost Glass Frog (about 10%), with each one's daily chance of a sighting.
Where does the Emerald Glass Frog sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Emerald Glass Frog is recorded against all the amphibians logged in Arenal Volcano National Park (84 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.
