Overview
The Rhino-horned Lizard (Ceratophora stoddartii) is a charismatic, slow-moving agamid lizard endemic exclusively to the misty, cloud-swathed mountain heights of Sri Lanka’s Central Highlands. Renowned for the prominent, pointed white horn projecting forward from the tip of its snout, this arboreal reptile blends seamlessly against the mossy, lichen-encrusted tree bark of high-elevation cloud forests, moving with deliberate, chameleon-like grace.
Biology and Physical Characteristics
Ceratophora stoddartii possesses a laterally compressed body equipped with slender limbs and long, gripping digits suited for grasping slippery mossy branches. Its most distinctive morphological feature is the rostral appendage—a rigid, conical horn composed of modified dermal scales that extends horizontally from the snout. In adult males, this horn is long, sharp, and ivory-white, functioning in sexual signaling and territory disputes, whereas in females it is noticeably reduced or rudimentary. Their skin coloration ranges from rich olive-green to mottled mossy brown.
Behavior and Ecology
A diurnal, arboreal specialist, the Rhino-horned Lizard spends most of its daylight hours perched motionlessly on vertical tree trunks between one and three meters above the forest floor. When threatened, rather than fleeing at high speed, it relies on crypsis, flattening its body tightly against the trunk and slowly shifting its position to keep the tree between itself and the observer. It feeds on slow-moving invertebrate prey, snapping up earthworms, tree beetles, and caterpillars with a swift flick of its jaws.
Conservation and Human Impact
Classified as Endangered by the IUCN, Ceratophora stoddartii faces severe ecological pressure from historical deforestation, commercial tea plantation encroachment, and forest fragmentation in Sri Lanka’s high mountains. Climate change presents an acute threat, as warming temperatures push high-elevation cloud forest biomes higher up mountain slopes where no further terrain exists. Strict conservation protection in Horton Plains National Park and Peak Wilderness Sanctuary provides vital strongholds for remaining populations.
Interesting Factoid
The male Rhino-horned Lizard sports a sharp ivory horn on the tip of its nose like a miniature rhinoceros, which it uses to show off to rival lizards while clinging perfectly still on mossy tree bark.
Last updated: October 2026