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Bernhard's Mantella
Mantella bernhardi
One of the smallest and most endangered Mantella species, featuring a dark brown body with yellow-orange accents and a black belly patterned with white horseshoe spots.
- Taxonomy
- Class:AmphibiaOrder:AnuraFamily:MantellidaeSubfamily:MantellinaeGenus:MantellaSpecies:Mantella bernhardi
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Environment
Terrestrial
Humidity
70 - 100 %
Day temperature
20 - 26 °C
Night temperature
18 - 20 °C
UVB
Low
Species description
Geographical Origin and Habitat: Endemic to the primary lowland rainforests of southeastern Madagascar (specifically the Manombo region). It is a terrestrial species that lives on the forest floor among damp leaf litter, decaying wood, and muddy stream banks.
Taxonomy and Genetics: One of the smallest Mantella species, reaching only 2-2.5 cm in length. The dorsum is dark brown or black, while the flanks and upper limbs display bright yellow or orange patches. The belly is black, marked with distinct white horseshoe-shaped spots.
Behavior and Habits: Diurnal, active, and elusive. It spends its time foraging on the damp forest floor. Males possess a single dark vocal sac and produce a distinct call consisting of short, metallic chirps to attract females.
Morphology: Adult females are slightly larger and display a much rounder, stockier build than males. Males are slimmer and have a darker, stretchable throat area where the vocal sac is located.
Care, breeding and tankmates
Terrarium Setup: Requires a horizontal or cubic terrarium (minimum 60x45x45 cm) designed as a bioactive setup. Provide a damp soil substrate topped with a thick layer of leaf litter (oak or catappa leaves) and hiding places like cork bark or coconut shells. They are terrestrial and do not need tall branches.
Lighting and Heating: Requires a mild, temperate climate. Keep daytime temperatures around 24-25°C; temperatures exceeding 28°C can be fatal. Provide a night drop to around 20°C. A low-intensity 5% UVB source is recommended to support calcium absorption.
Humidity and Hydration: Maintain high humidity levels between 80% and 90%. Mist regularly with declorinated or RO water to keep the substrate damp but not waterlogged. Excellent ventilation is critical to prevent stagnant air and bacterial buildup.
Feeding and Supplementation: Insectivorous. Due to their small size, they must be fed tiny live prey such as flightless fruit flies (Drosophila melanogaster), springtails, and pinhead crickets. Dust prey items with calcium and vitamin supplements three times a week.
Compatibility: A peaceful and social species that does well in mixed-sex groups of the same species. As they are highly endangered and CITES-protected, captive breeding should be prioritized by experienced keepers.
Health and Common Diseases: Highly vulnerable to heat stress and poor hygiene, which can cause ammonia toxicity or Red Leg disease. Never handle with bare hands; human skin oils and chemicals can easily poison their highly permeable skin.
Geographic Origin and Distribution
Endemic to the primary lowland rainforests of southeastern Madagascar (specifically the Manombo region). It is a terrestrial species that lives on the forest floor among damp leaf litter, decaying wood, and muddy stream banks.
Origin
North AmericaAfrica and Madagascar
Amphibian profile
- Diet
- Insectivore
- Eat bugs. Feed daily. Add vitamins.
- Life expectancy
- 5-10 years
- The catalog uses 5–10 years as its concise reference range. AmphiBIO v1 instead reports a documented maximum longevity of 3 years for the species. An observed maximum is not the same as a typical expectation: specimen origin, sample size and husbandry conditions can explain differences among sources, so this figure should be read as a recorded limit rather than a promise of survival.
- Adult size
- 2.5 cm
- The catalog's scalar value is 2.5 cm. The AmphiBIO v1 source reports a maximum adult measurement of 2.4 cm for this species, recorded as snout–vent length (SVL). These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
- Lifestyle/Microhabitat
- Terrestrial
- Need high humidity. Forage constantly. Stable temps.
- Activity cycle
- Diurnal
- Strictly diurnal. Morning peaks. 12h cycle.
- Sociality
- Gregarious
- Very active. Males defend. Add barriers.
- Reproduction
- Oviparous
- Breed in rain. Males call. Tads swim.
- Toxicity
- Harmless
- In its native habitat, Mantella bernhardi secretes potent lipophilic alkaloids from its skin as a defense mechanism against predators. These toxins are acquired entirely through their specialized diet of toxic wild arthropods. However, captive-bred individuals, or wild-caught specimens kept in captivity for extended periods, completely lose their toxicity due to the lack of these specific dietary precursors. Despite being harmless in captivity, it is always recommended to wear disposable gloves when handling them. This precaution is primarily to protect the frog's sensitive, permeable skin from the natural oils, salts, and potential chemicals present on human hands.
- Life stage
- For Mantella bernhardi, the life cycle begins with a small clutch of eggs laid in a dark, humid terrestrial or phytotelm (plant water) location. Once the eggs develop and hatch, the resulting tadpoles are meticulously transported on the back of a parent to a suitable rearing pool. The tadpoles develop in these small bodies of water over the course of two to three months. Following metamorphosis, tiny, fully-formed froglets emerge onto land, requiring consistently high humidity to survive. These froglets are extremely small and must be fed large quantities of microscopic prey, such as springtails, until they grow larger.
- Handling tolerance
- Display only
- Handling of Mantella bernhardi should be strictly avoided unless absolutely necessary for health inspections or transferring enclosures. Like all amphibians, they possess highly permeable, sensitive skin that quickly absorbs toxins, salts, and oils from human hands, which can be fatal. If a transfer is required, the safest and least stressful method is to gently coax the frog into a clean plastic catch cup rather than using your hands. If physical contact is entirely unavoidable, you must wear powder-free nitrile gloves thoroughly moistened with dechlorinated water. Even then, the interaction should be kept as brief as possible to minimize the severe physiological stress handling causes.
- Brumation
- Not required
- Originating from consistent tropical or subtropical environments, the Mantella bernhardi does not undergo a true brumation period. In their natural habitat, they experience relatively stable temperatures year-round, with environmental shifts primarily driven by wet and dry seasons rather than extreme cold. In captivity, it is critical to maintain steady, optimal temperatures and high humidity levels throughout the entire year. Exposing these amphibians to significant temperature drops can severely compromise their immune system and lead to respiratory or digestive failures. While a slight reduction in humidity and a few degrees of temperature drop can simulate a dry season to cycle breeders, severe cooling must be completely avoided.
- Molting
- Periodic
- Like all amphibians, the Mantella bernhardi undergoes a regular molting process to shed its outer layer of skin as it grows and to maintain skin health. This shedding process occurs frequently but is usually very rapid and highly secretive, meaning keepers rarely witness it occurring. The frog will typically contort its body, repeatedly open and close its mouth, and use its limbs to push the loosened skin forward over its head. Once the shed is removed, the frog will almost always consume the old skin to recycle valuable nutrients and proteins. Maintaining ideal humidity levels in the terrarium is paramount, as dry conditions can cause the skin to adhere, leading to deadly infections or restricted blood flow.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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