Duellmanohyla rufioculis
Silhouette: Dmitry Bogdanov (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~60% in a week ~90%
The rufous-eyed brook frog or rufous-eyed stream frog (Duellmanohyla rufioculis), is a species of frog in the family Hylidae. It is endemic to the mountains of Costa Rica. Its natural habitats are premontane wet forests and rainforests. Tadpoles are found in pools with standing water. Habitat loss is posing some threat to the species, although the overall population is stable.
These frogs grow to 4.1 cm (1.6 in) long; males are smaller than females. Color is extremely variable, ranging from brown to mottled mossy green. A distinct white stripe along the upper lip, flanks, and groin expands beneath the eyes to form a prominent white mark. All specimens have a distinctive red iris with horizontal pupils.
The rufous-eyed brook frog is endemic to the mountainous regions of Costa Rica, and can be found on the Caribbean and Pacific slopes from 700 to 1,600 m (2,310 to 5,250 ft) asl. This species favors humid forests, and lives in foliage alongside streams. Though threatened by habitat destruction and uncommon within its range, the overall population is believed to be stable. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 2 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Monteverde Theme Park | 🇨🇷 Costa Rica |
Possible
About 30% of wildlife watchers report a Rufous-eyed brook frog sighting in Monteverde Cloud Forest Reserve on a given day, based on 106 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 2nd most-seen of the 19 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.
July
In that month about 40% of wildlife watchers report a Rufous-eyed brook frog in Monteverde Cloud Forest Reserve on a given day, against about 20% in January–February and April–May, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Rufous-eyed brook 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.
Yes
Of the 3 parks where we can rate Rufous-eyed brook frog sightings, Monteverde Cloud Forest Reserve has the highest daily chance: about 30%. Next come Tenorio Volcano National Park (Costa Rica, about 20%) and Arenal Volcano National Park (Costa Rica, about 10%).
Same family: Hylidae
The closest relatives of the Rufous-eyed brook frog that you can see in Monteverde Cloud Forest Reserve (family Hylidae, Hylid Tree Frogs) are Meadow Tree Frog (about 10%), Masked Tree Frog (about 10%) and Drab Tree Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rufous-eyed brook frog is recorded against all the amphibians logged in Monteverde Cloud Forest Reserve (106 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.
