A strictly coastal species with highly variable colouration dependent on habitat. Dorsal (upper) surfaces may be pale grey, greenish, brown or black with heavy speckling. Some individuals have a dark longitudinal stripe down the spine. Flanks usually have a broad dark stripe in the upper areas which may be bordered by a narrow pale stripe above, and less often, below. Throat is grey or cream often with black flecks. Belly: cream to yellow, pinkish/red, grey, or black, may be speckled with black. Some individuals are entirely black.
Shore skink reach SVL (snout-vent-lengths) of up to 80mm with a relatively short tapering tail. The snout is slender and pointed. Shore skink may be confused with speckled skink, though there is very little range overlap. Shore skink have a distinctive pointed snout and are much less heavily built.
Found on the mainland and offshore islands along the north-eastern coast of the North Island.
Ecology and habitat
Shore skinks inhabit shorelines in open habitats often up to 200 m from the shoreline in dune vegetation. Found amongst driftwood at the high tide mark, in piles of seaweed, and amongst mat-forming vegetation in sand dunes. A diurnal species which are avid sun baskers, but will retreat quickly if disturbed. Shore skink have been observed diving into rockpools.
Shore skink are ovoviviparous giving birth to litters of 4-6 young from January to March.
On stony beaches, shore skink forage in the intertidal zone at low tide. The species are omnivorous consuming invertebrates as well as berries and fruits, including those of Coprosma species, Macropiper excelsum (kawakawa), Mehulenbeckia and the weeds Solanum nodiflorum (knightshade) and Phytolacca octandra (pokeweed).
The endoparasite Hedruris minuta have been found in shore skink.
DOC classify shore skink as ‘naturally uncommon’ .
Also known as Smith’s skink. Populations on the west coast of the North Island (Tatahi skink / western shore skink) considered taxonomically indeterminate (may be a separate species). Named after Lieutenant Alexander Smith of the British Royal Navy who took part in an expedition where the original species specimens were collected in the 1840s.
McCann assigned two subspecies (O. s. smithi and O. s. numerale), however, genetic studies (Hare et al. 2008) did not support the notion of separate species. Instead multiple clades (groups of organisms with a common ancestor and all its lineal descendants) within the species were identified:
- Clade 1
- O. Smithi ‘Three Kings’ (listed as Western shore/Tatahi skink in Jewell, 2008)
- Clade 2a
- Hauraki Gulf and Coromandel Peninsular
- Clade 2b
- Tauranga, Bay of Plenty
- Clade 2c
- Eastern Northland from Poor Knights Islands.
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- Hare, K.M., Daugherty, C.H., & Chapple, D.G. (2008). Comparative phylogeography of three skink species (Oligosoma moco, O. Smithi, O. Suteri; Reptilia: Scincidae) in northeastern New Zealand. Molecular Phylogenetics and Evoloution, 45, 1, 303-315.
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