Amphibians beginning with R

Rabor's forest frog - Its natural habitats are subtropical or tropical dry forests, subtropical or tropical moist lowland forests, and subtropical or tropical moist montanes. It is threatened by habitat loss. Discovered in 1943

Rain Frog - The Rain Frog is a species of frog in the Microhylidae family. It is endemic to Australia. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montanes. It is threatened by habitat loss.

Rancho grande harlequin frog - For years, this species was considered extinct because despite considerable effort, none had been found since 1986. However, in 2003 a small population was found.

Ranger’s Toad - The Ranger's Toad is a species of toad in the Bufonidae family. It is found in Lesotho, South Africa, Swaziland, possibly Botswana, possibly Mozambique, possibly Namibia, and possibly Zimbabwe. Its natural habitats are subtropical or tropical dry forests, dry savanna, moist savanna, subtropical or tropical dry shrubland, subtropical or tropical dry lowland grassland, subtropical or tropical high-altitude grassland, freshwater lakes, freshwater marshes, arable land, plantations , water storage areas, and ponds.

Rattling frog - The Rattling Frog is a species of frog in the Microhylidae family. It is endemic to Australia. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Ravine salamander - Its natural habitat is temperate forests. It is threatened by habitat loss.

Red Hills Salamander - The range of the Red Hills Salamander is restricted to a narrow belt of two geological formations, approximately 60 miles long and between 10 and 25 miles wide , in southern Alabama. These formations are included within the Red Hills physiographic province of the Coastal Plain. The range is limited on the east by the Conecuh River and on the west by the Alabama River . Currently, there are eight published locality records from Butler, Conecuh, Covington, Crenshaw, and Monroe Counties .

Red salamander - Its natural habitats are temperate forests, temperate shrubland, rivers, intermittent rivers, and freshwater springs. It is threatened by habitat loss. Red salamanders eat insects, spiders and smaller salamanders.

Red-crowned toadlet - This is a small species of frog, reaching 30 mm in length. It is characterised by the red "T" shaped mark on its head. It is dark brown or black above with a red wash or spots over its back, and a red mark near the vent. The sides are a blue-grey and there is a white mark in the armpits and thighs. The ventral surface is very strongly marbled black and white, with a bluish colour in some areas between the black and white.

Red-eyed treefrog - Red-eyed tree frogs, as their name states, have bold red eyes with vertically narrowed noses, a vibrant green body with yellow and blue striped sides, and orange toes. There is a great deal of regional variation in flank and thigh coloration Red-eyed tree frogs have soft, fragile skin on their belly, and the skin on their back is thicker and rougher.

Red-legged Salamander - Its natural habitat is temperate forests. It is threatened by habitat loss.

Red-webbed Treefrog - Rhacophorus rhodopus is a disputed species of frog in the moss frog family . It occurs in southeastern Asia, from India to southern China, and south to Malaysia. Previously unknown from Laos, it has now been found in Phongsali Province and at Luang Prabang.

Redbelly Newt - The Red-bellied Newt, when fullgrown, measures between 2.75 to 3.5 inches from its nose to its vent, and between 5.5 to 7.5 inches from nose to its tail. It has grainy skin, and is brownish black on top with a tomato red underbelly. It can be distinguished from other coastal newts by its red belly and a lack of yellow in its eyes. Breeding males develop smooth skin and a flattened tail.

Relictual slender salamander - The Relictual Slender Salamander is a species of salamander in the Plethodontidae family. It is endemic to the United States. Its natural habitats are temperate forests and freshwater springs.

Revealed Frog, Whirring Tree Frog - The Revealed Tree Frog or Whirring Tree Frog, is a species of tree frog native to coastal eastern Australia.

Rich Mountain Salamander - Its natural habitat is temperate forests. It is threatened by habitat loss.

Ridge Tail Salamander - Its natural habitats are subtropical or tropical moist montanes, rural gardens, and heavily degraded former forest. It is threatened by habitat loss.

Ringed salamander - It is found in damp forested areas, usually under leaves, rotting logs, or in abandoned ground holes of other organisms, near shallow ponds. Highly fossorial , adults are often found in subterranean refuges .

Ringtail Salamander - Bolitoglossa robusta is a species of salamander in the Plethodontidae family. It is found in Costa Rica and Panama. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montanes. It is threatened by habitat loss.

Rio Carauta Stubfoot Toad - The Rio Carauta Stubfoot Toad is a species of toad in the Bufonidae family. It is endemic to Colombia. Its natural habitats are subtropical or tropical moist montanes and rivers. It is threatened by habitat loss.

Rio grande chirping frog - The Rio Grande Chirping Frog or Mexican Chirping Frog is a small Leptodactylid frog found from the southern United States in scattered locales in the state of Texas, and south into the Mexican states of Nuevo León, Tamaulipas, San Luis Potosí, and Veracruz. It is a terrestrial frog, that lays its eggs in moist areas of soil and leaf litter. It is quite common throughout its range.

Rio Grande Leopard Frog - The Rio Grande Leopard Frog

Robust blind salamander - The Blanco Blind Salamander is a species of aquatic, lungless salamander native to the United States. It is endemic to a small region of the Blanco River near San Marcos in Hays County, Texas. Its habitat, deep in limestone karst, makes collecting specimens for research particularly problematic. It is known from only a single specimen, collected in the 1950s.

Robust Frog - The Robust Frog is a species of frog in the Microhylidae family. It is endemic to Australia. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montanes. It is threatened by habitat loss.

Rock frog - Female guajóns are slightly larger than males, reaching a mean size of 2.01 inches in length whereas the males reach about 1.71 inches.

Rocket Frog - This species of frog is very variable in colour and patterning. It reaches 55 mm in length, has extremely long legs and is very streamlined. Its dorsal surface is shades of brown with longitudinal skin folds or warts that are darker in colour than the skin around them. The ventral surface is white and granular. A brown stripe starts from the nostril, goes through the eye, through the tympanum and ends between the armpit and groin. The tympanum is brown with a white circle surrounding it. The thighs are marked with black lines on a yellow background. Throats of breeding males are yellow. Although being a 'tree frog' this species spends most of its life as a frog on the land, due to its inability to climb because of its small discs.

Rocky Mountain Tailed Frog - Until 2001, the genus was believed to be monotypic, the single species being the tailed frog . However in that year Nielson, Lohman, and Sullivan published evidence in Evolution that promoted the Rocky Mountain tailed frog from a subspecies to its own species. Since then, the former species has been formally called coastal tailed frog.

Romer's Treefrog - The female frog is slightly larger than the male. The body of the creature is tan brown, with the underside white. An X-like marking, made up of two crooked black lines, can be seen on the dorsum. Sometimes the lines do not meet medially, thus leading to a chevron marking posteriorly. The skin is peppered with fine granules. A distinct fold extends from the eye to the foreleg.

Rose’s Rain Frog - Frogs in this species spend most of their lives in subterranean nests under sandy ground, where they lay their eggs. They surface during heavy rain. They cannot swim, and are not found in water. Tadpoles develop inside the eggs and hatch as fully-formed baby frogs.

Rose’s ghost frog - Its natural habitats are temperate forests, Mediterranean-type shrubby vegetation, rivers, and caves. It is threatened by habitat loss.

Roth’s Tree Frog - Roth's Tree Frog is a medium sized frog, reaching a maximum length of 5.7 centimetres . The body is elongated, with a small head and large eyes. Roth's Tree Frog is an arboreal frog, and its toe pads are wider than its fingers. The dorsal surface is a dull grey to brown colour, and can be blotched with dark brown. The inner thighs and armpits are black and blotched with bright yellow or orange. The tympanum is visible, with a fold of skin covering the top portion.

Rough Sand Frog - The Rough Sand Frog is a species of frog in the Ranidae family. It is found in Angola, Democratic Republic of the Congo, Namibia, Tanzania, Zambia, Zimbabwe, possibly Malawi, and possibly Mozambique. Its natural habitats are dry savanna, moist savanna, freshwater marshes, and intermittent freshwater marches.

Roughskin Newt - T. granulosa is divided into two subspecies. Both have rough or granular skin, except for breeding males, which additionally exhibit swollen vents and cornified toe pads.

Royal Ghost Frog - Its natural habitats are temperate forests, Mediterranean-type shrubby vegetation, and rivers. It is threatened by habitat loss.

Rubber Eel - Typhlonectes natans, also called the Rubber Eel, is a species of caecilian in the family Caeciliidae. It is found in Colombia, Venezuela, and possibly Trinidad and Tobago. Its natural habitats are dry savanna, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, subtropical or tropical seasonally wet or flooded lowland grassland, and rivers. The rubber eel is commonly kept as an aquarium pet, and is sometimes sold as a "fish" in aquarium stores.

Ryukyu Brown Frog - The Kampira Falls Frog, Yaeyama Harpist Frog or Harpist Brown Frog is a species in the true frog family . Until recently known as Rana psaltes, it is found on Ishigaki and Iriomote in the Yaeyama Islands of Japan, as well as on Taiwan.

Ryukyu Tip-nosed Frog - The Ryukyu Tip-nosed Frog, Odorrana narina, is a species of frog in the Ranidae family. It is endemic to Japan.