Amphibian atlas

Geographical Origin and Habitat: This cryptic and species is native to the primary and secondary rainforests of Southeast Asia, including Malaysia, Sumatra, and Borneo. The Malayan horned frog (or long-nosed horned frog) lives permanently on the forest floor among leaf litter and moist soils near slow-flowing streams, relying on its exceptional camouflage to avoid predators.

Taxonomy and Genetics: The species is highly adapted for crypsis, resembling a dry leaf. It features dramatic, horn-like dermal projections above the eyes and a pointed snout. The skin is smooth, with distinct lateral folds that mimic leaf veins. Coloration ranges from shades of brown, rust, orange, and tan to match the leaf litter. Females are significantly larger and bulkier than males, reaching lengths of 10 to 14 cm, while males are smaller and more slender.

Behavior and Habits: This terrestrial species is primarily nocturnal and acts as a sit-and-wait ambush predator. During the day, it remains buried and motionless in leaf litter. At night, it hunts large insects, spiders, and occasionally small rodents or other frogs. Males produce a loud, metallic call resembling a hammer striking an anvil ("tink") to attract females.

Morphology: The species exhibits pronounced sexual dimorphism. Females are much larger and heavier (10–14 cm) with a robust, rounded body shape, while males are smaller, more slender, and possess a darker throat patch visible during calling.

Terrarium Setup: Requires a spacious, horizontal terrarium (minimum 80x45x45 cm) with ample floor space. The substrate must consist of a deep layer of moist peat or coconut fiber, topped with a thick layer of dried leaves (such as Ketapang or oak) where the frog can bury itself. A very shallow water dish must be provided, as these frogs are poor swimmers and can easily drown in deep water.

Lighting and Heating: Prefers moderate tropical temperatures between 24-27°C during the day, with a nightly drop to 20-22°C. Temperatures above 28°C can cause severe heat stress and should be strictly avoided. A low-output 5% UVB light is recommended to support calcium metabolism and healthy skeletal development.

Humidity and Hydration: High humidity levels between 75-85% are essential. However, adequate ventilation is critical to prevent stagnant conditions and bacterial infections (such as Red Leg syndrome). Mist the terrarium daily with declorinated or RO water, keeping the substrate damp but not waterlogged.

Feeding and Supplementation: Highly voracious ambush predators. Offer a varied diet of large crickets, Dubia roaches, locusts, earthworms, and occasionally pinky mice (sparingly, as they are high in fat). Gut-load prey insects and dust them regularly with a high-quality calcium and vitamin D3 supplement.

Compatibility: Strictly solitary. These frogs are highly cannibalistic and will consume smaller conspecifics or fight aggressively. Keep only one specimen per enclosure.

Health and Common Diseases: Highly sensitive to ammonia build-up from waste. Regular substrate maintenance and clean water are essential to prevent bacterial septicemia (Red Leg syndrome). Avoid handling them with bare hands, as the oils and acids on human skin can harm their permeable skin.