The Nevis Valley is dry. The sun is harsh. Oligosoma toka does not mind. At eighteen to twenty-two centimetres in length, it is a large, robust skink. Dark brown to greyish-brown colouration features pale flecks and stripes that provide camouflage among schist rocks. Belly is pale cream. Eyes are dark and watchful. A lizard that has learned to live with less. This is a skink of the rocks and the sun. Found only in the Nevis Valley in Central Otago, in rocky outcrops, schist tors, and tussock grasslands. It basks on sun-warmed rocks, soaking up heat that fuels its hunting. A lizard that lives where shade is scarce. Prefers north-facing slopes where sun warms the rocks. Confined to a few rocky outcrops in a single valley. Biologically, the Nevis Skink is viviparous, giving birth to live young. Females produce two to four offspring each year. A slow reproductive rate that makes species vulnerable to population decline. Young are born in late summer and are miniature versions of adults. Independent from birth. A slow return. A long wait. One of New Zealand's rarest lizards. Restricted range makes it vulnerable to localised threats. Population is declining. Habitat loss from farming, fire, and spread of invasive weeds is primary threat. Also threatened by predation from introduced rats, cats, and hedgehogs. Climate change affects dry interior habitats. Classified as Nationally Critical, with fewer than 1,000 individuals remaining. To see a Nevis Skink is to see a lizard of the dry valley. A survivor of harsh Otago landscape. Its future depends on protection of rocky habitat and control of predators. The schist rock is warm. The skink basks, dark brown against grey stone, watching with dark eyes. The sun beats down. The skink does not move. It has been here for thousands of years. It will be here as long as the rocks remain.