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AmphibianTerrestrialIntermediate
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Boulenger's pygmy wrinkle-faced frog
Cornufer boulengeri
A rather small, robust terrestrial frog endemic to the Solomon Islands and Bougainville, characterized by its specialized direct development process without requiring any aquatic larval stage.
Class:Amphibia
Order:Anura
Family:Ceratobatrachidae
Subfamily:Ceratobatrachinae
Genus:Cornufer
Species:Cornufer boulengeri
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Environment
Terrestrial
Humidity
70 - 90 %
Day temperature
24 - 28 °C
Night temperature
22 - 24 °C
UVB
Low
Species description
Geographical Origin and Habitat: Cornufer boulengeri is a small terrestrial frog species endemic to the Solomon Islands archipelago and Bougainville Island, which is politically part of Papua New Guinea. It primarily inhabits the forest floor of primary and secondary tropical rainforests characterized by constantly high humidity. It finds its ideal habitat within the leaf litter layer, inside decaying logs, under moss-covered stones, and among dense low herbaceous vegetation, ranging from sea level up to hilly and mid-altitude montane zones.
Taxonomy and Genetics: It belongs to the class Amphibia, order Anura, family Ceratobatrachidae, and genus Cornufer (previously classified under the genus Platymantis). Genetic studies on this species have highlighted a remarkable evolutionary adaptation related to insularity and the lack of permanent streams in its reproductive microhabitat, resulting in the development of a direct-development reproductive strategy where the aquatic tadpole stage is completely bypassed.
Behavior and Habits: This species is predominantly nocturnal and secretive. During daylight hours, it remains hidden under damp leaves or inside crevices of decomposing wood to prevent dehydration. At dusk, it becomes active to hunt for small invertebrates and for breeding purposes. Males emit distinctive vocalizations, similar to short chirps or metallic whistles, positioning themselves on low leaves or small branches a few centimeters above the forest floor to attract females to their territory.
Morphology: It is a small frog, with adult snout-to-vent length ranging between 2.5 and 3.5 centimeters, and females being slightly larger than males. The skin on the back has a characteristic texture, finely wrinkled or bearing small longitudinal ridges that mimic the veins of dry leaves. Coloration is highly variable and cryptic, ranging from shades of earthy brown, mud grey, and reddish-brown, often interrupted by dark spots or transverse bands on the legs.
Care, breeding and tankmates
Terrarium Setup: For a small group of 3-4 specimens, a horizontally oriented terrarium measuring at least 45x45x45 cm (approx. 18x18x18 inches) is required. The substrate must consist of a lower drainage layer (expanded clay), covered by a mesh and a bioactive soil substrate made of coconut fiber and peat, topped with a generous layer of dry oak or magnolia leaves and live moss. Terrarium decor should include cork bark pieces, low branches, and robust live plants such as ferns, pothos, and bromeliads.
Lighting and Heating: Being a nocturnal species, it does not require intense lighting. However, the use of a LED light for plant growth and a low-output UVB lamp (2% or 5%) is recommended to support vitamin D3 synthesis. Daytime temperatures should be maintained between 22°C and 26°C (72°F - 79°F), with a nighttime drop to 19-20°C (66°F - 68°F). Temperatures exceeding 28°C (82°F) for extended periods can be fatal to this heat-sensitive species.
Humidity and Hydration: Humidity must be kept constantly high, between 80% and 90%. It is necessary to mist the terrarium once or twice daily using dechlorinated or reverse osmosis water. The substrate should be kept damp but not waterlogged or muddy. A very shallow water dish with sloping edges containing clean, dechlorinated water should be provided, though the frog gets most of its hydration from the humid air and water droplets on leaves.
Feeding and Supplementation: Strictly insectivorous. The diet in captivity should be based on live insects of appropriate size: fruit flies (Drosophila melanogaster and D. hydei), small crickets, springtails, and small tropical isopods. Springtails and isopods are also excellent for keeping the terrarium clean. It is essential to dust the prey with a calcium and vitamin D3 supplement twice a week and with an amphibian multivitamin once a week.
Compatibility: It is highly recommended to keep this species in a species-only terrarium. They can be housed in small groups (e.g., one male and two females) provided there is sufficient space and plenty of hiding spots to avoid competition-induced stress. They must never be housed with other amphibian or reptile species, both due to the risk of mutual predation and the potential transmission of lethal pathogens.
Health and Common Diseases: Dehydration is the most immediate danger; a drastic drop in humidity can cause death within a few hours. They are also prone to bacterial skin infections and fungal diseases if the terrarium is kept too wet and lacks proper ventilation (stagnant air). Another common risk in captivity is Metabolic Bone Disease (MBD), preventable with proper calcium supplementation and UVB lighting. Feces should be checked periodically for internal parasites.
Geographic Origin and Distribution
Cornufer boulengeri is a small terrestrial frog species endemic to the Solomon Islands archipelago and Bougainville Island, which is politically part of Papua New Guinea. It primarily inhabits the forest floor of primary and secondary tropical rainforests characterized by constantly high humidity. It finds its ideal habitat within the leaf litter layer, inside decaying logs, under moss-covered stones, and among dense low herbaceous vegetation, ranging from sea level up to hilly and mid-altitude montane zones.
Origin
Australia, New Guinea, and Oceania
Amphibian profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- No verified data available
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Toxicity
- No verified data available
- Life stage
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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