Polypedates cruciger
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~70% in a week ~90%
Polypedates cruciger (commonly known as the Sri Lanka whipping frog or common hour-glass tree-frog) is a species of frog in the family Rhacophoridae endemic to Sri Lanka. It has been osbserved as high as 1600 meters above sea level.
This frog can tolerate different habitats, including secondary forest, banana farms, gardens, and buildings. Scientists have not seen this frog in primary forest. Scientists say this frog is not in danger of dying out because of its large range and tolerance to altered habitat.
Scientists used to think frog was conspecific with Polypedates pseudocruciger, which lives in India's Western Ghat mountains. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 2 | Minneriya National Park | 🇱🇰 Sri Lanka | |
| 3 | Wilpattu National Park | 🇱🇰 Sri Lanka | |
| 4 | Udawalawe National Park | 🇱🇰 Sri Lanka |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Colombo [Sri Jayawardenepura Kotte] | 🇱🇰 Sri Lanka |
Possible
About 30% of wildlife watchers report a Common Hourglass Tree Frog sighting in Colombo [Sri Jayawardenepura Kotte] on a given day, based on 55 verified sightings from GBIF citizen-science data. It is the 2nd most-seen of the 7 amphibians we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
March, July and September
In those months about 40% of wildlife watchers report a Common Hourglass Tree Frog in Colombo [Sri Jayawardenepura Kotte] on a given day, against about 20% in June and October–November, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Common Hourglass Tree Frog sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Colombo [Sri Jayawardenepura Kotte], in our data
Colombo [Sri Jayawardenepura Kotte] is the only city on Wallace's Line with enough records to rate Common Hourglass Tree Frog sightings: about 30% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Common Hourglass Tree Frog is recorded against all the amphibians logged in Colombo [Sri Jayawardenepura Kotte] (55 verified sightings), 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.
