Leptodactylus fuscus
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~50% in a week ~80%
Leptodactylus fuscus is a species of frog in the family Leptodactylidae. Its local name in Brazil is rã-assobiadora (lit. 'whistling frog'). The English name rufous frog has been proposed by Frank & Ramus and is currently used by the IUCN. It is found in Argentina, Bolivia, Brazil, Colombia, French Guiana, Guyana, Panama, Paraguay, Peru, Suriname, Trinidad and Tobago, and Venezuela.
This frog lives in grassy places, marshes, urban areas, and degraded forests. Scientists observed the frog between 0 and 1750 meters above sea level. This frog has shown a strong tolerance to antropogenic disturbance. Scientists have reported the frog many protected places. In Brazil, about 17 percent of these frogs live in protected parks.
The male frogs call to the female frogs when it rains. The frog deposits eggs in burrows in wet areas and near lagoons. When rainwater floods the burrows, the larvae swim out into nearby bodies of water. Scientists from the IUCN say this frog is least concern of extinction. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tayrona National Natural Park | 🇨🇴 Colombia | |
| 2 | Main Ridge Forest Reserve | 🇹🇹 Trinidad and Tobago |
Possible
About 20% of wildlife watchers report a Whistling Grass Frog sighting in Main Ridge Forest Reserve on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 10th most-seen of the 10 amphibians we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
June
In that month about 40% of wildlife watchers report a Whistling Grass Frog in Main Ridge Forest Reserve on a given day, against under 5% in August and November–April, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Whistling Grass 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 Whistling Grass Frog sightings, Main Ridge Forest Reserve ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Tayrona National Natural Park (Colombia, about 20%).
GBIF citizen-science records
It is estimated from how often the Whistling Grass Frog is recorded against all the amphibians logged in Main Ridge Forest Reserve (7 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.
