Lithobates forreri
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~20% in a week ~40%
Forrer's grass frog or Forrer's leopard frog (Lithobates forreri) is a species of frog in the family Ranidae found in Mexico and Central America through Guatemala, El Salvador, Honduras, and Nicaragua to Costa Rica. It is a widespread and common frog found in lowland and seasonal tropical forests. It can also adapt to man-made habitats such as flooded agricultural lands and other water content systems. Reproduction requires permanent pools and lagoons.
Hillis D.M., Frost J.S., Wright D.A. (1983). "Phylogeny and biogeography of the Rana pipiens complex: A biochemical evaluation". Systematic Zoology. 32 (2): 132–143. doi:10.2307/2413277. JSTOR 2413277.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Hillis D.M. (1988). "Systematics of the Rana pipiens complex: Puzzle and paradigm". Annual Review of Ecology and Systematics. 19: 39–63. doi:10.1146/annurev.es.19.110188.000351. Hillis D.M., Wilcox T.P. (2005). "Phylogeny of the New World true frogs (Rana)" (PDF). Molecular Phylogenetics and Evolution. 34 (2): 299–314. doi:10.1016/j.ympev.2004.10.007. PMID 15619443. Archived from the original (PDF) on 2008-05-28.
Hillis D. M. (2007). "Constraints in naming... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santa Rosa National Park | 🇨🇷 Costa Rica | |
| 2 | Palo Verde National Park | 🇨🇷 Costa Rica | |
| 3 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 4 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 5 | Carara National Park | 🇨🇷 Costa Rica | |
| 6 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Monteverde Theme Park | 🇨🇷 Costa Rica |
With luck
About 10% of wildlife watchers report a Forrer's Grass Frog sighting in Arenal Volcano National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 29th 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 40%, if each day is a fresh chance.
January–June, August and November
In those months about 10% of wildlife watchers report a Forrer's Grass Frog in Arenal Volcano National Park on a given day, against under 5% in July, September–October and December, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Forrer's Grass Frog sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
6th of 6
Of the 6 parks where we can rate Forrer's Grass Frog sightings, Arenal Volcano National Park ranks 6th at about 10%. The best odds are in Santa Rosa National Park (Costa Rica, about 30%), Palo Verde National Park (Costa Rica, about 20%) and Tenorio Volcano National Park (Costa Rica, about 20%).
Same genus: Lithobates
The closest relatives of the Forrer's Grass Frog that you can see in Arenal Volcano National Park (genus Lithobates, American Water Frogs) are Warszewitsch's Frog (about 40%), Vaillant's Frog (about 20%) and Peralta Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Forrer's Grass Frog is recorded against all the amphibians logged in Arenal Volcano National Park (10 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.
