Dactylocnemis "Three Kings"

Three Kings gecko

Dactylocnemis "Three Kings"

Three Kings gecko (Three Kings Islands, Northland). <a href="https://www.flickr.com/photos/rocknvole/">© Tony Jewell</a>
Image attribution
Three Kings gecko (Three Kings Islands, Northland). © Tony Jewell
Herpetofaunal category
NZ Geckos
Species complex
Conservation Status
At Risk - Naturally Uncommon
Common names
Three Kings gecko

Length: SVL up to 100mm, with the tail being equal to the body length

Weight: unknown

Description

The largest species in the Dactylocnemis genus, and one of New Zealand's largest geckos. Three Kings geckos are a member of the Pacific gecko group (Dactylocnemis spp.) which became isolated on the Three Kings Islands 60km north-west of Cape Reinga in Northland. They are the only species of gecko that occurs on the Three Kings Islands.

Three Kings geckos are large / robust in build and their pattern is highly variable. Rostral scale is in broad contact with the nostril. Dorsal surfaces can be various shades of grey, brown or olive, with lighter markings that may include stripes, blotches and chevrons, which may be drab or strongly contrasting. Occasionally there is a bright mustard-yellow patch on the nape of the neck, there may be additional markings of the same colour continuing down the body and tail. Ventral surface is a uniform grey / pink. Mouth and tongue are pink, tongue often has a grey tip.

Life expectancy

Unknown.

Distribution

Island-endemic. Confined to the Three Kings Islands 60km north of Cape Reinga (Northland). Found on all of the main islands and some of the smaller islands in the Three Kings group.

Ecology and habitat

Three Kings geckos are nocturnal emerging at dusk to forage, but may cryptically sun-bask at the entrance of a retreat. They may be terrestrial or arboreal.

Inhabits forest, scrub or open areas. During the day, Three Kings geckos take refuge in flax, under loose bark on trees, in tree hollows, under rocks and logs, or in creviced rock outcrops.

Social structure

Similar to other species in the genus Dactylocnemis, Three Kings geckos are tolerant of conspecifics and can form large aggregations in retreat sites.

Breeding biology

Three Kings geckos are viviparous, but the details of their breeding biology are poorly known. Females may breed biennially and give birth in late autumn (based on reproductive status of museum specimens). 

Diet

Three Kings geckos are primarily insectivorous, but also consume berries / fruit, and nectar from the flowers of native plants.

Disease

Unknown.

Conservation strategy

All islands in the Three Kings group are pest-free, they have always been free of rats or mice, and goats were eradicated in 1946. Three Kings geckos are abundant and occupy their entire known historical range within the group. As such, no specific conservation action is required apart from biosecurity measures to maintain the pest-free status of these islands.

Interesting notes

Three Kings geckos are members of the genus Dactylocnemis, a group of closely related species which are confined to the North Island of New Zealand, are regionally distributed (including several island-endemic species), and were once all considered as a single highly-variable species - Hoplodactylus pacificus.

References

Hitchmough, R.A., Barr, B., Lettink, M., Monks, J., Reardon, J., Tocher, M., van Winkel, D., Rolfe, J. (2016). Conservation status of New Zealand reptiles, 2015; New Zealand threat classification series 17. Wellington: New Zealand Department of Conservation.

Jewell, T. (2011). A photographic guide to reptiles and amphibians of New Zealand. Auckland: New Holland Publishing.

van Winkel, D., Baling, M. & Hitchmough, R. (2018). Reptiles and Amphibians of New Zealand: A field guide. Auckland: Auckland University Press, 376 pp.