Overview
The Black Microhylid Frog (Melanobatrachus indicus), also known as the Malabar Black Narrow-mouthed Toad, is an ancient, enigmatic amphibian endemic to the mist-covered montane rainforests of the southern Western Ghats of India. Representing a monotypic genus that diverged tens of millions of years ago, this relict species is recognized by its midnight-black, tuberculated body vividly speckled with brilliant scarlet or orange dots along its flanks and belly, serving as a flagship symbol of ancient Indian bio-geography.
Biology and Physical Characteristics
Melanobatrachus indicus possesses a squat, rotund physique with short, robust limbs designed for fossorial burrowing through damp forest substrates. Its dorsal skin is deep brownish-black and covered in low glandular tubercles. In stark contrast, its throat, belly, and lateral margins are splashed with dazzling vermilion-red, orange, and white spots. Its small, pointed head features a narrow mouth and tiny, forward-oriented dark eyes with horizontal pupils.
Behavior and Ecology
Highly secretive and semi-fossorial, the Black Microhylid Frog spends the vast majority of its life hidden beneath thick carpets of rotting leaf litter, decomposing logs, and wet moss pads in high-elevation shola forests. It emerges primarily during the torrential onset of the southwest monsoon to forage on forest-floor ants and termites. During the monsoon, males call from shallow leaf-choked puddles and seepages with soft, resonant trills, where females deposit small clutches of pigment-free eggs.
Conservation and Human Impact
Classified as Endangered on the IUCN Red List and ranked as a top priority species by the Zoological Society of London’s EDGE of Existence programme, Melanobatrachus indicus is restricted to fragmented patches of pristine shola forest. It faces severe risks from tea and cardamom plantation expansion, pesticide runoff, and road infrastructure. Protected sanctuaries including the Indira Gandhi Wildlife Sanctuary and Periyar Tiger Reserve are vital strongholds for its persistence.
Interesting Factoid
The Black Microhylid Frog is a living relic of Gondwana: it is the sole surviving species of an evolutionary branch that diverged more than 65 million years ago, surviving unchanged in the wet mountain pockets of southern India.
Last updated: October 2026