Leptodactylus macrosternum
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~50% in a week ~80%
Leptodactylus macrosternum is a species of frogs in the family Leptodactylidae. It is found in northern Argentina and adjacent eastern Bolivia, Paraguay, northern Uruguay, and southern and western Brazil. The specific name chaquensis refers to the area of Gran Chaco in Argentina. The common names Cei's white-lipped frog and Miranda's white-lipped frog have been coined for it, although this particular species lacks the light upper lip stripe common in the genus.
Adult males measure 65–94 mm (2.6–3.7 in) and adult females 69–98 mm (2.7–3.9 in) in snout–vent length. No light upper lip stripe is present. The dorsum and the flanks have several well-developed pairs of skin folds. Toes have lateral fringes.
Sexually active males have a pair of keratinized thumb spines. They have three distinct advertisement calls: growls, grunts, and trills, of which the first one is the most frequent. Tadpoles of Gosner stage 36 measure 42 mm (1.7 in) in total length.
Leptodactylus macrosternum is a ground-dwelling species occurring near ponds and flooded areas at elevations below 1,000 m (3,300 ft). The eggs are deposited in large foam nests over puddles...
Recording0:23
Uruguay · 2026
Sebastián Gómez Barboza Silveira · iNaturalist · CC0
Recording0:01
Argentina · 2025
© Camilo Garcia Gonzalez · iNaturalist · CC BY-NC 4.0
Recording0:35
Brazil · 2021
© Breno Farias · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | El Impenetrable National Park | 🇦🇷 Argentina | |
| 2 | Madidi National Park | 🇧🇴 Bolivia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Fortaleza | 🇧🇷 Brazil |
Possible
About 20% of wildlife watchers report a Miranda's White-lipped Frog sighting in Madidi National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
January
In that month about 40% of wildlife watchers report a Miranda's White-lipped Frog in Madidi National Park on a given day, against under 5% in June–July and November, the lowest months. That is one of Madidi National Park's wettest months, with about 240 mm of rain against 40 mm in July.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Miranda's White-lipped 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.
2nd of 2
Of the 2 parks where we can rate Miranda's White-lipped Frog sightings, Madidi National Park ranks 2nd at about 20%. The best odds are in El Impenetrable National Park (Argentina, about 30%).
GBIF citizen-science records
It is estimated from how often the Miranda's White-lipped Frog is recorded against all the amphibians logged in Madidi National Park (5 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.
