Torrent frogs are a number of unrelated frog

Frog

Frogs are amphibians in the order Anura , formerly referred to as Salientia . Most frogs are characterized by a short body, webbed digits , protruding eyes and the absence of a tail...

s that prefer to inhabit small rapid-flowing mountain or hill streams with a lot of torrents. They are generally smallish neobatrachia

Neobatrachia

Neobatrachia are a suborder of the Anura, the order of frogs and toads. This suborder is the most advanced and apomorphic of the three anuran orders alive today; hence its name, which literally means "new frogs"...

ns with a greyish-brown and usually darkly mottled back, giving them excellent camouflage

Crypsis

In ecology, crypsis is the ability of an organism to avoid observation or detection by other organisms. It may be either a predation strategy or an antipredator adaptation, and methods include camouflage, nocturnality, subterranean lifestyle, transparency, and mimicry...

 among wet rocks overgrown with algae; their well-developed feet make them agile climbers of slippery rocks.

Torrent frogs belong to the following taxa:

• The "torrent frogs" of Asia
  Asia
  Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...
  
   are certain species
  Species
  In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
  
   in the genera
  Genera
  Genera is a commercial operating system and development environment for Lisp machines developed by Symbolics. It is essentially a fork of an earlier operating system originating on the MIT AI Lab's Lisp machines which Symbolics had used in common with LMI and Texas Instruments...
  
   Amolops
  Amolops
  Amolops is a quite large genus of true frogs native mainly to eastern and southeastern Asia. These frogs are quite closely related to such genera as Huia, Meristogenys, Odorrana, Pelohylax and Rana, but still form a distinct lineage among the core radiation of true frogs...
  
  , Huia
  Huia (genus)
  Huia is a group of true frogs found in Southeast Asia. Many are commonly known as "torrent frogs" after their favorite habitat - small rapid-flowing mountain and hill streams -, but this name is used for many similar-looking frogs regardless of whether they are closely related...
  
  , Micrixalus
  Micrixalus
  Micrixalus is a genus of true frogs from tropical Asia. They are mostly found in riverine habitats in rocks and vegetation amid small forest streams...
  
  , Nanorana
  Nanorana
  Nanorana is a small genus of true frogs.-Species:* Nanorana parkeri .* Nanorana pleskei Günther, 1896.* Nanorana ventripunctata Fei et Huang, 1985....
  
  and Odorrana
  Odorrana
  Odorrana is a genus of true frogs from East Asia and surrounding regions. Many of these frogs inhabit fast-flowing mountain streams, and they typically have a remarkably pointed snout, as evidenced by common names like "long-snout" or "tip-nosed frog" and scientific names like nasica or nasutus...
  
  of the true frog family (Ranidae)
• The "torrent frogs" of Africa
  Africa
  Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...
  
   are the genus Arthroleptides
  Arthroleptides
  Arthroleptides is a genus of frog in the Petropedetidae family, known as the African Torrent Frogs.It contains the following species:* Du Toit's Torrent Frog * Usambara Torrent Frog...
  
  , sometimes included in the Ranidae and otherwise placed in a distinct family Petropedetidae
• The "torrent frogs" of Australia
  Australia
  Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
  
   are the genus Taudactylus
  Taudactylus
  Taudactylus is a genus of frogs in the family Myobatrachidae. These frogs are endemic to rainforest areas of coastal eastern Australia, most of this genus inhabit fast flowing streams in highland area. Most members of this genus have suffered serious declines, in which the disease chytridiomycosis...
  
  of the Australian ground frog family (Myobatrachidae
  Myobatrachidae
  Myobatrachidae is a family of frogs found in Australia and New Guinea. Members of this family vary greatly in size, from species less than long, to the second largest frog in Australia, the Giant Barred Frog , at in length...
  
  ).
• The Torrent Treefrog (Litoria nannotis) of Australia
  Australia
  Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
  
   is in the tree frog family (Hylidae)

See also

• Grass frog (disambiguation)
• Green frog (disambiguation)
• Rocket frog (disambiguation)
• Tree frog
  Tree frog
  Hylidae is a wide-ranging family of frogs commonly referred to as "tree frogs and their allies". However, the hylids include a diversity of frog species, many of which do not live in trees, but are terrestrial or semi-aquatic.-Characteristics:...