Hamptophryne boliviana
Silhouette: Dmitry Bogdanov (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~70% in a week >90%
Hamptophryne boliviana, also known as the Bolivian bleating frog or Amazon sheep frog, is a species of frogs in the family Microhylidae. It is found in the northern and western sides of the Amazon basin in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. Genetic analysis suggests hidden diversity within the nominal species.
Adult males from Peru measure 34–39 mm (1.3–1.5 in) and adult females 39–44 mm (1.5–1.7 in) in snout–vent length; some populations might be smaller in body size. The body is moderately robust. The fingers and toes bear distinct terminal discs; lateral fringes and webbing are not present. The dorsum is tan with a large, brown mid-dorsal blotch. There is usually a faint, creamy white mid-dorsal stripe. The flanks, sides of the head, and concealed surfaces of the limbs are dark brown. Males have dark brown throat. The belly and ventral surfaces of the hind limbs are creamy white with brown spots or reticulations. The iris is pale bronze and has fine black reticulations.
These frogs are found in the leaf litter of primary and secondary tropical rainforests at elevations up to 400... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tambopata National Reserve | 🇵🇪 Peru | |
| 2 | Manu National Park | 🇵🇪 Peru | |
| 3 | Yasuní National Park | 🇪🇨 Ecuador |
Likely
About 40% of wildlife watchers report an Amazon Sheep Frog sighting in Manu National Park on a given day, based on 87 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 3rd most-seen of the 67 amphibians we can rate there. Over three days the chance rises to about 70%, and over a week to over 90%, if each day is a fresh chance.
April
In that month about 60% of wildlife watchers report an Amazon Sheep Frog in Manu National Park on a given day, against under 5% in May, the lowest month.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Amazon Sheep 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.
Among the best
Of the 3 parks where we can rate Amazon Sheep Frog sightings, Manu National Park ranks 2nd at about 40%, level with the leaders once rounded. The best odds are in Tambopata National Reserve (Peru, about 40%).
Same family: Microhylidae
The closest relatives of the Amazon Sheep Frog that you can see in Manu National Park (family Microhylidae, Narrow-mouthed Frogs) are Brown Egg Frog (about 10%), Eyebrowed Humming Frog (about 10%) and Acre's Oval Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Amazon Sheep Frog is recorded against all the amphibians logged in Manu National Park (87 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.
