Eastern Sand Skink

The eastern sand skink (Trachylepis depressa), also called the eastern coastal skink, is a small, distinctly flattened skink adapted to life on and just below sandy ground. The back is usually brown to grey-brown, with a dark stripe running from behind the eye toward the hindlimb and a paler stripe below it. The underside is cream-coloured, while the dorsal scales are keeled and give the back a subtly ridged texture.

The flattened head and body help the skink move through loose substrate. A specimen from central Mozambique measured 16.7 cm in total length, including a 9.6 cm tail. The species was formerly placed in the broad genus Mabuya but is now classified in Trachylepis.

The eastern sand skink is closely associated with sandy lowlands of southeastern Africa. It occurs in vegetated coastal dunes, dune scrub, sandy bushveld and other habitats on loose sandy or alluvial soils. Its known range extends from coastal KwaZulu-Natal and the northeastern South African lowveld into southern Mozambique, with records also from farther inland in the region.

Along the coast it occurs in dune scrub and other sandy vegetation, including the sandy Mozambique coastal plain of northern KwaZulu-Natal. Loose substrate is a central part of the habitat because it provides both feeding ground and immediate refuge below the surface.

The species feeds on small invertebrates, mainly insects and other arthropods. It searches for prey in and around sandy ground, litter and low vegetation. The relative importance of different prey groups is still poorly known.

The eastern sand skink is a shallow burrower. When disturbed it can disappear rapidly beneath loose sand rather than relying only on vegetation or surface cover. This provides immediate shelter from predators and harsh surface conditions and is one of the clearest adaptations linking the species to sandy habitat.

Burrowing does not protect it from every disturbance. A study published in 2020 found eastern sand skinks among the most numerous reptile casualties after a prescribed spring fire in Tembe Elephant Park. Twenty individuals were recorded in the surveyed area, equivalent to an estimated 25 animals per hectare. Most were not visibly burned. The deaths may instead have resulted from asphyxiation, extreme heat or gases affecting animals sheltering close below the surface. Although this was a local fire, it shows a vulnerability that is easy to overlook in a sand-burrowing reptile.

Eastern sand skinks are oviparous, with females laying eggs rather than giving birth to live young. Little else is known about their breeding, and reliable species-specific figures for clutch size, incubation and breeding timing are not yet available.

The eastern sand skink is classified as least concern on the IUCN Red List. It occurs in sandy habitats of southeastern Africa and is not considered globally threatened.

Intense fires can cause substantial local mortality, but no major threat is currently recognised across the species’ range.