Hoplobatrachus crassus
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~70% in a week ~90%
Hoplobatrachus crassus, also called Jerdon's bullfrog, Jerdon's bull frog, and South Indian bullfrog, is a species of frog found widely distributed on the plains of India, Bangladesh, Nepal, and Sri Lanka. Its range may extend to the adjacent Bhutan and Myanmar.
This species has a shovel shaped metatarsal tubercle and has longer hind legs than the somewhat similar H. tigrinus with which it overlaps in part of its range. When the leg is stretched along the body the tibio-tarsal (ankle) joint lies at a position between the ear and eye. Females are slightly larger than males (about 8–10 cm or more while males are about 5–8 cm). The skin of the dorsum is olive green to yellow in color with brown or black spots. Some individuals have a yellow stripe down the spine.
Hoplobatrachus crassus is a terrestrial frog that lives in seasonally flooded dry grasslands, open plains and arid areas, also in cultivated areas and near human settlements. Adult frogs are often found in burrows. They may aestivate during dry periods. Breeding takes place in water. Males have two vocal sacs on the side and the call sounds somewhat like a bleating goat. The calls last... Wikipedia →
Recording0:28
India · 2025
© Aditya Satish · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Horton Plains National Park | 🇱🇰 Sri Lanka | |
| 2 | Minneriya National Park | 🇱🇰 Sri Lanka |
Possible
About 30% of wildlife watchers report a Jerdon's Bullfrog sighting in Horton Plains 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 70%, and over a week to about 90%, if each day is a fresh chance.
January
In that month about 50% of wildlife watchers report a Jerdon's Bullfrog in Horton Plains National Park on a given day, against under 5% in March and December, the lowest months. That is one of Horton Plains National Park's driest months, with about 100 mm of rain against 370 mm in October. September has too few records to rate.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Jerdon's Bullfrog sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Jerdon's Bullfrog sightings, Horton Plains National Park has the highest daily chance: about 30%. Next come Minneriya National Park (Sri Lanka, about 10%).
Same order: Anura
The closest relatives of the Jerdon's Bullfrog that you can see in Horton Plains National Park (order Anura, Frogs and Toads) are Saddled Tree frog (about 30%) and Dull-green Shrub Frog (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Jerdon's Bullfrog is recorded against all the amphibians logged in Horton Plains 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.
