Oligosoma repens

Eyres skink

Oligosoma repens
(Chapple et al., 2011)

Eyres skink (Eyre Mountains). <a href="https://www.instagram.com/samanimalman/">© Samuel Purdie</a>
Image attribution
Eyres skink (Eyre Mountains). © Samuel Purdie
Herpetofaunal category
NZ Skinks
Species complex
Conservation Status
Threatened - Nationally Vulnerable
Common names
Eyres skink

Length: SVL up to 62 mm, with the tail being longer than the body length

Weight: At least 3 grams

Description

A brightly colored species related to the burgan skink (Oligosoma burganae) and Nevis skink (Oligosoma toka) (Chapple et al. 2011) with a snout-vent-length (SVL) up to 62 mm.

Eyre's skinks typically have a yellow-brown dorsal surface that is usually more of a gold color than its close relatives. This species possesses a dark brown mid-dorsal stripe that extends to the base of the tail. This species also typically bears thin pale dorsolateral stripes, which have black margins. The lateral surfaces of this species bear a darker lateral band that is bordered above by the dorsolateral stripe, and below by a pale cream-yellow stripe too. The ventral surface of this species is a brilliant lemon yellow colour (typically mustard yellow in Nevis skink (Oligosoma toka), with a white-grey chin and throat, which may possess black speckles. Eye colour brown. 3 supraocular scales. Subdigital lamellae 19-23. Soles of feet are black or dark brown (van Winkel et al. 2018; pers. comm Carey Knox).

Life expectancy

Unknown.

Distribution

This species was initially thought to be restricted to the Eyre Mountains, however, this species has now also been found in the Thompson Mountains, Hector Mountains, Tākitimu Mountains, Eldrig Peak, Humbolt Mountains, Mount Titaroa, Mount Luxmore, Borland Saddle (Fiordland), and the Murchison Mountains. 

Ecology and habitat

Eyre's skinks are diurnal, terrestrial, heliothermic, and are often saxicolous. They occur in close sympatry with species like the McCann's skink (Oligosoma maccanni), however, can be recognized by their 3 (vs. 4) supraocular scales, and more golden-yellow (vs. grey-brown) color. This species is often found in rocky shrubland, talus, screes, tussockland and herbfield. Was thought to be a higher altitude specialist, but has been found in the lowlands near Lake Te Anau (van Winkel et al. 2018; pers.comm. Samuel Purdie 2021; pers. comm. Tony Jewell 2021). 

Social structure

Uknown.

Breeding biology

Unkown.

Diet

Feeds on small insects and possibly the fruits of native shrubs.

Disease

Unknown.

Conservation strategy

This species is not currently being actively managed.

Interesting notes

Like Nevis skink (Oligosoma toka), this species has been known to curl its tail above its body as a possible defense mechanism.

References

Chapple, D. G., Bell, T. P., Chapple, S. N., Miller, K. A., Daugherty, C. H., & Patterson, G. B. (2011). Phylogeography and taxonomic revision of the New Zealand cryptic skink (Oligosoma inconspicuum; Reptilia: Scincidae) species complex. Zootaxa2782(1), 1-33.

van Winkel, D., Baling, M., Hitchmough, R. 2018. Reptiles and amphibians of New Zealand – a field guide. Auckland university press, Auckland New Zealand.