Hong Kong cascade frog or Hong Kong torrent frog (Amolops hongkongensis) is a species of true frog from southern coastal China,[1] once thought to be endemic to Hong Kong. Their eggs are laid on rock faces in the splash zones of cascades.[2] 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.[1] In Hong Kong, the species is found in the New Territories and on Hong Kong Island.[2] It was found in rather small streams in Lung Fu Shan.[3]
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 40mm. Tadpoles are up to 25mm in length.[4] 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.[2]