Craugastor rugosus
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~30% in a week ~60%
Craugastor rugosus is a species of rain frog in the family Craugastoridae. It is found in Costa Rica and southwestern Panama, and possibly southern Nicaragua. A local Spanish vernacular name is ranita de hojarasca. Frank and Ramus (1995) invented the name Veragua robber frog for use in English for the taxon Eleutherodactylus biporcatus (now the name of a Venezuelan species, but in 1995 the name for four other species of frog, including this one, see taxonomy), Veragua being a province of Colombia in the 1860s (now in central Panama) where in 1995 the holotype of E. biporcatus was thought to have been obtained. Because of the taxonomic reshuffling which occurred after Frank and Ramus coined the name "Veragua robber frog", their name is presently applied to Craugastor rugosus, despite the fact that it does not occur in Veraguas Province, and now shares this name with other species derived from E. biporcatus.
This frog is thought to have first been collected in Chiriquí whilst the region was still Colombian (Panama succeeded a few decades later) by one H. Ribbe, who sent a collection of herpetological specimens to Berlin in the early 1870s. It was... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Piedras Blancas National Park | 🇨🇷 Costa Rica | |
| 2 | Corcovado National Park | 🇨🇷 Costa Rica |
With luck
About 10% of wildlife watchers report a Rugose Robber Frog sighting in Corcovado National Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 17th most-seen of the 27 amphibians we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
November
In that month about 30% of wildlife watchers report a Rugose Robber Frog in Corcovado National Park on a given day, against under 5% in June and August–October, the lowest months. That is one of Corcovado National Park's wettest months, with about 610 mm of rain against 65 mm in February.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Rugose Robber Frog sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
2nd of 2
Of the 2 parks where we can rate Rugose Robber Frog sightings, Corcovado National Park ranks 2nd at about 10%. The best odds are in Piedras Blancas National Park (Costa Rica, about 30%).
Same genus: Craugastor
The closest relatives of the Rugose Robber Frog that you can see in Corcovado National Park (genus Craugastor, Northern Rainfrogs) are Fitzinger's Robber Frog (about 20%), Stejneger's Robber Frog (about 20%) and Isla Bonita Robber Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rugose Robber Frog is recorded against all the amphibians logged in Corcovado National Park (16 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.
