Amolops hongkongensis
In 3 days ~30% in a week ~60%
Hong Kong cascade frog or Hong Kong torrent frog (Amolops hongkongensis) is a species of true frog from southern coastal China, once thought to be endemic to Hong Kong. Their eggs are laid on rock faces in the splash zones of cascades. In Hong Kong, it is a protected species under Wild Animals Protection Ordinance Cap 170.
Originally described from Tai Mo Shan in Hong Kong, populations are now also known from Guangdong. In Hong Kong, the species is found in the New Territories and on Hong Kong Island. It was found in rather small streams in Lung Fu Shan.
Amolops hongkongensis inhabit forest-fringed, small hill streams, particularly those with cascades. Tadpoles have a ventral sucker helping them to maintain their position in the stream. Its habitat is threatened by silviculture, clear-cutting, and dam and other infrastructure construction.
Both male and female Amolops hongkongensis grow to a snout–vent length of 40 mm (1.6 in). Tadpoles are up to 25 mm (0.98 in) in length. The diameter of its suction discs is 3-4 times the width of the fingers. It contains the tarsal fold and has white velvety nuptial pads on the first fingers.
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| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hong Kong | 🇨🇳 China |
With luck
About 10% of wildlife watchers report a Hong Kong Cascade Frog sighting in Hong Kong on a given day, based on 76 verified sightings from GBIF citizen-science data. It is the 11th most-seen of the 16 amphibians we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
June and August–October
In those months about 20% of wildlife watchers report a Hong Kong Cascade Frog in Hong Kong on a given day, against under 5% in February–March and December, the lowest months. Those are among Hong Kong's wettest months, with about 180 mm of rain a month against 25 mm in December.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Hong Kong Cascade 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.
Only Hong Kong, in our data
Hong Kong is the only city on Wallace's Line with enough records to rate Hong Kong Cascade Frog sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Ranidae
The closest relatives of the Hong Kong Cascade Frog that you can see in Hong Kong (family Ranidae, Typical Frogs) are Guenther's Frog (about 20%), Longtoushan Large Odorous Frog (about 10%) and Large Odorous Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hong Kong Cascade Frog is recorded against all the amphibians logged in Hong Kong (76 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.
