The glass frogs belong to the amphibian family Centrolenidae. While the general background coloration of most glass frogs is primarily lime green, the abdominal skin of some members of this family is transparent and translucent, giving the glass frog its common name. The internal viscera, including the heart, liver, and gastrointestinal tract, are visible through the skin. When active their blood makes them visible; when sleeping most of the blood is concealed in the liver, hiding them. Glass frogs are arboreal, living mainly in trees, and only come out for mating season. Their transparency conceals them very effectively when sleeping on a green leaf, as they habitually do.
Hyalinobatrachium is a genus of glass frogs, family Centrolenidae. They are widely distributed in the Americas, from tropical Mexico to southeastern Brazil and Argentina.
Centrolene ballux is a species of frog in the family Centrolenidae. It is known from a few disjunct localities on the Pacific versant of the Cordillera Occidental in southern Colombia and northern Ecuador. Common names golden-flecked glassfrog and Burrowes' giant glass frog have been coined for it.
Centrolene heloderma is a species of frog in the family Centrolenidae from the Andes in Colombia and Ecuador. It is also known as Pichincha giant glass frog or bumpy glassfrog.
Centrolene huilensis is a species of frog in the family Centrolenidae. It is endemic to Colombia and only known from the region of its type locality near Isnos, on the Cordillera Central in the Huila Department.
Cochranella litoralis is a species of frog in the family Centrolenidae. It is known from the Pacific lowlands of southwestern Colombia and northern Ecuador. The specific name litoralis refers to the proximity of the type locality to the sea.
Centrolene lynchi, also known as Lynch's giant glass frog, Lynch's glassfrog, and the Tandayapa giant glass frog, is a species of frog in the family Centrolenidae. It is found in the Risaralda Department and Nariño Department on the Cordillera Occidental of Colombia and on the western Andes in the Pichincha, Cotopaxi, and Santo Domingo de los Tsáchilas Provinces, Ecuador. It is named after John Douglas Lynch, the herpetologist who collected the first specimens of this species.
"Centrolene" medemi is a species of frog in the family Centrolenidae. The species occurs in the Cordillera Oriental in the Tolima, Caquetá, and Putumayo Departments in Colombia and adjacent Napo in Ecuador. The generic placement of this species within the subfamily Centroleninae is uncertain. The specific name medemi honors Fred Medem, collector of the holotype. Common name Medem giant glass frog has been coined for it.
Centrolene notosticta is a species of frog in the family Centrolenidae. It is found on the Cordillera Oriental in Colombia and on its extension to north, Serranía del Perijá, in the Zulia state in Venezuela.
Ikakogi tayrona, or the Magdalena giant glass frog, is a species of frog in the family Centrolenidae. It is endemic to the Sierra Nevada de Santa Marta, Magdalena Department, Colombia. It is the only glass frog that is known to show maternal care.
Nymphargus balionota is a species of frog in the family Centrolenidae. It is found in the Andes of Colombia and Ecuador. Common names Mindo Cochran frog and mottled glassfrog has been coined for it.
Cochranella mache, also known as the Mache glassfrog or Mache Cochran frog, is a species of frogs in the family Centrolenidae. It is found in the lowland forest and eastern slopes of Cordillera Mache–Chindul in the Esmeraldas Province, northwestern Ecuador, and in the western foothills of the Cordillera Occidental in Colombia.
Nymphargus posadae is a species of frog in the family Centrolenidae, formerly placed in Cochranella. It inhabits the eastern slopes of the Andes of Colombia, Ecuador, and northeastern Peru. It is reasonably common in Colombia but rare in Ecuador.
Cochranella resplendens is a species of frog in the family Centrolenidae. It is found in the upper Amazon Basin in southwestern Colombia, eastern Ecuador, northern Peru, and Bolivia. There are also isolated records from the Cordillera Central in Antioquia, Colombia, and Amapá in northern Brazil. The specific name resplendens is derived from the Latin verb resplendo and hints to the jewel-like appearance of this frog. It is sometimes known as the resplendent Cochran frog or resplendent glassfrog.
Hyalinobatrachium chirripoi is a species of frog in the family Centrolenidae. It is found in extreme northern Ecuador, northwestern Colombia, Panama, and Costa Rica, as well as in Honduras. The specific name chirripoi refers to the Chirripó Indians inhabiting the area of the type locality, Suretka in the Talamanca canton of Costa Rica. Common name Suretka glass frog has been coined for it.
Hyalinobatrachium munozorum, also known as Upper Amazon glass frog, is a species of frog in the family Centrolenidae. It is found in the upper Amazon Basin in Ecuador, Colombia, and northern Bolivia; it is presumably to be found in intervening Peru; earlier records from Peru have been assigned to Hyalinobatrachium carlesvilai.
Hyalinobatrachium pellucidum, also known as the Rio Azuela glass frog, is a species of frog in the family Centrolenidae. It is found in lower montane rainforests on the Amazonian Andean slopes in Ecuador and Peru. The specific name pellucidum is Latin for "transparent" and refers to the transparent parietal peritoneum of this species.
Hyalinobatrachium valerioi, sometimes known as the La Palma glass frog, is a species of frog in the family Centrolenidae. It is found in central Costa Rica and south to Panama and the Pacific lowlands and slopes of western Colombia and Ecuador; also in the Magdalena River Valley of Colombia.
Nymphargus is a genus of glass frogs in the subfamily Centroleninae, which was established in 2007. They are distributed in the Andean slopes of Colombia, Ecuador, Peru, and Bolivia. They are characterized by lacking webbing among the outer fingers, lacking humeral spines in adult males, and having a lobed liver covered by a transparent hepatic peritoneum. They can be more specifically characterized as having a head that is darker green than the body, there being yellow spots surrounded by black on head and body, upper eyelids are dark lavender. The conservation status of the Nymphargus frogs was largely believed to be critically endangered due to the minimal research done on this genus. Once the scope of the research was broadened the conservation status was able to be determined as being vulnerable. More frogs of different variations were found increasing the genus’ population.
Centrolene savagei is a species of frog in the family Centrolenidae that is endemic to the Andes of western Colombia, specifically the Cordillera Occidental and Cordillera Central. Its common name is Savage's Cochran frog.
