Sachatamia ilex
Silhouette: Dmitry Bogdanov (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~20% in a week ~50%
Sachatamia ilex is a species of frog in the family Centrolenidae. It is found in eastern Nicaragua, Costa Rica, Panama, western Colombia (Pacific lowlands and the Pacific slopes of the Cordillera Occidental), and western Ecuador. The common name Limon giant glass frog has been coined for this species, apparently in reference to its type locality in the canton of Limón, Costa Rica, and it is also known as Holly's glassfrog and the ghost glass frog.
Adult males measure 27–29 mm (1.1–1.1 in) and females 28–34 mm (1.1–1.3 in) in snout–vent length. The snout is truncate in lateral view. Both fingers and toes have webbing and there are adhesive discs on the tips of the digits. The dorsal skin is shagreen. The dorsum is uniform dark green in color while the gular region and belly are creamy white. The iris is white or light gray with black reticulations.
This frog is active at night. In the day it crouches on the upper side of a leaf, adjusting its colour to match the background. The males call from the upper surfaces of the leaves near streams and may engage in fights. The eggs are black and are deposited on the upper surface of the leaves, and when they hatch, the larvae... Wikipedia →
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Costa Rica · 2025
© Chris Harrison · XC1029856 · CC BY-NC-SA 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 2 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Oklahoma City Zoo and Botanical Garden | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Ghost Glass Frog sighting in Arenal Volcano National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 25th 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 50%, if each day is a fresh chance.
June, August–September and November–April
In those months about 10% of wildlife watchers report a Ghost Glass Frog in Arenal Volcano National Park on a given day, against under 5% in May, July and October, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Ghost Glass Frog sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Among the best
Of the 2 parks where we can rate Ghost Glass Frog sightings, Arenal Volcano National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Braulio Carrillo National Park (Costa Rica, about 10%).
Same family: Centrolenidae
The closest relatives of the Ghost Glass 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 Ghost Glass Frog is recorded against all the amphibians logged in Arenal Volcano National Park (14 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.
