Ceratophrys stolzmanni
Silhouette: Margot Michaud · PhyloPic
In 3 days ~40% in a week ~60%
The Pacific horned frog (Ceratophrys stolzmanni), also known as Pacific big-mouthed frog, Stolzmann's horned frog and Ecuadorian horned frog, is a species of frog in the family Ceratophryidae. It is found in Ecuador and Peru. Its natural habitats are subtropical or tropical dry forest, subtropical or tropical dry shrubland, and sandy shores. Its geographical range is very fragmented; it has a total area of about 20,000 km2 and is continuously shrinking due to human activities.
Breeding is triggered by heavy rain fall and Pacific horned frogs reproduce explosively over the course of a single night. Typically, Pacific horned frogs lay underground during day and they are most active after sundown. Male frogs reproduce by approaching females both on land and shallow water and clasp on to the female, in a variation of axillary amplexus, also known as "neck amplexus".
In the wild, horned frogs fulfill their voracious appetite by eating small fish and rodents, while the adolescents eat smaller bugs and worms. In captivity they usually feed on worms and bugs (typically nightcrawlers, superworms, waxworms, and crickets). They also eat small fish and baby feeder... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Machalilla National Park | 🇪🇨 Ecuador |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Pacific Horned Frog sighting in Machalilla National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
March
In that month about 40% of wildlife watchers report a Pacific Horned Frog in Machalilla National Park on a given day, against under 5% in July to January, the lowest months. That is one of Machalilla National Park's wettest months, with about 130 mm of rain against 5 mm in September.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Pacific Horned Frog sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Machalilla National Park, in our data
Machalilla National Park is the only park on Wallace's Line with enough records to rate Pacific Horned Frog sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Pacific Horned Frog is recorded against all the amphibians logged in Machalilla National Park (11 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.
