boldly patterned skink of Otago schist
- Size
- Length: 25–30 cm
- Lifespan
- 15–20 years
- Diet
- Insectivorous. Feeds on insects, wētā, small lizards, and fruit. Opportunistic scavenger. Vital seed disperser for native shrubs like Melicytus.
- Habitat
- Tussock grasslands and rocky outcrops in Central Otago. Requires rocky habitats with abundant sun exposure and nearby cover for thermoregulation.
- Range
- Found only in Central Otago. Tussock grasslands and rocky outcrops of Macraes Flat area. One of most restricted ranges of any New Zealand lizard.
- Endemism
- Endemic
- Main Threats
- Predation by introduced cats, stoats, ferrets, and hedgehogs. Habitat loss from farming and fire. Fewer than 2,000 individuals remaining in wild.
- Population
- Nationally Critical. One of New Zealand's rarest lizards. Found only in Central Otago. Intensive predator control and captive breeding programmes underway.
- Conservation Status
- Nationally Critical
- Human Risk
- harmless
- Handling Note
- threatened native skink, handling by the public is not permitted
- Conservation Note
- Endemic skink; restricted to specific rocky outcrops in Central Otago.
- Assessment
- NZTCS Reptiles and Amphibians (2021)
- Te Ao Māori
- In vast, golden landscape of Central Otago, Mokomoko is silent inhabitant of stone. To iwi of south, these large skinks are seen as part of whakapapa (genealogy) of rocks themselves. Creatures that have watched mountains wear down over millennia. Because they are so large and strikingly patterned, they were often viewed as chieftains of lizard world. They represent resilience of drylands.
It is not just a skink. It is a luxury off-road tank. Oligosoma otagense reaches up to 30 centimetres in length. They are the heavyweights of the New Zealand skink world. They do not just scuttle. They command the rock. Skin is a stunning mosaic of black, grey, and olive-green blotches that mimic lichens growing on schist. Making them nearly invisible until they move. Unlike smooth, glossy textures of many other skinks, the Otago Skink has a rugged, armoured appearance. Carved directly from the stone it inhabits.
The Otago Skink is a dedicated sun-worshipper. In cool climate of south, they spend significant portion of day basking on flat surfaces of schist rocks to raise body temperature. However, they are always on a hair-trigger. At slightest hint of a shadow, be it passing hawk or curious human, they vanish into deep rock crevices with startling speed. These crevices are their fortresses. Providing protection from predators and stable temperature during extreme Otago winters. Surprisingly long-lived, potentially reaching 40 years or more. A single skink may inhabit same rock tor for nearly half a century.
Their diet is as robust as their physique. Primarily insectivores, feasting on beetles, moths, and spiders. They are also opportunistic fruit-eaters. They play vital role in ecosystem by consuming small berries of native shrubs like Melicytus and dispersing seeds across rocky landscape. Interestingly, they are also known to scavenge, occasionally feeding on remains of small birds or even other lizards. Like most New Zealand reptiles, they give birth to live young. Usually twins or triplets in mid-to-late summer.
Survival of the Otago Skink is currently dependent on intensive care conservation. Because they are large, slow-breeding, and highly visible to predators like feral cats and ferrets, their numbers plummeted during 20th century. Today, they are protected by massive predator-proof fences and intensive trapping networks. They are the Dragons of the South. A remnant of prehistoric era when New Zealand's drylands were teeming with giant, sun-loving reptiles. To see one today is a privilege.