Agalychnis annae
Silhouette: Margot Michaud · PhyloPic
In 3 days ~40% in a week ~70%
The blue-sided leaf frog (Agalychnis annae), also known as the orange-eyed leaf frog, is a vulnerable species of tree frog in the subfamily Phyllomedusinae native to the tropical rainforests of Costa Rica and Panama. The specific name annae honors Ann S. Duellman, the collector of the holotype and the describer's wife.
This tree frog is known only from the Central Valley of Costa Rica, on the slopes of the Cordillera de Talamanca, the Cordillera de Tilarán and the Cordillera Central ranges, at altitudes between about 600 and 1,650 m (2,000 and 5,400 ft). The total extent of its range is estimated to be around 16,000 km2 (6,178 mi2).
There may be a subpopulation in the Cerro Colorado range in western Panama, as suggested by a single female being found there (2012). Much of the forest in which the frog lives has been cleared, so there are a number of subpopulations separated by coffee plantations, cultivated areas and urban areas.
Agalychnis annae is fairly common in parts of the Central Valley, but in other undisturbed forests, like those in the Tapantí National Park and the Monteverde Biological Reserve, after it disappeared from pristine... Wikipedia →
Recording0:35
Costa Rica · 2025
© Chris Harrison · iNaturalist · CC BY-NC 4.0
Recording4:58
Costa Rica · 2023
© gloglomg · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 2 | Irazú Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Poás Volcano National Park | 🇨🇷 Costa Rica | |
| 4 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Langenberg Wildlife Park | 🇨🇭 Switzerland | |
| 2 | Parque Zoológico Nacional Simón Bolívar | 🇨🇷 Costa Rica | |
| 3 | Monteverde Theme Park | 🇨🇷 Costa Rica |
With luck
About 10% of wildlife watchers report a Blue-sided Tree Frog sighting in Irazú Volcano National Park on a given day, based on 44 verified sightings from GBIF citizen-science data from 2019 to 2026. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
May and September
In those months about 30% of wildlife watchers report a Blue-sided Tree Frog in Irazú Volcano National Park on a given day, against under 5% in February, the lowest month.
Between 6 and 9 pm
Across all the parks we cover, that three-hour window holds the most Blue-sided Tree 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 4 parks where we can rate Blue-sided Tree Frog sightings, Irazú 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%).
GBIF citizen-science records
It is estimated from how often the Blue-sided Tree Frog is recorded against all the amphibians logged in Irazú Volcano National Park (44 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.
