Solomon Islands Skink

Fascinating facts about the Solomon Islands Skink

• At up to 32 inches (81 cm) long, tail included, the Solomon Islands skink dwarfs every other living skink, its tail alone makes up more than half that length, giving it a built-in fifth limb for swinging through the canopy.
• Unlike most reptiles, this giant skink gives birth to live young after a six-to-eight-month pregnancy; newborns arrive at about 30 cm long and weigh 175 g, which Dr. Kevin Wright likened to a human mother delivering a six-year-old child.
• Members of a family group, or circulus, stay together for up to a year, with unrelated adults helping guard the juveniles, a social structure rare among lizards and a key reason they can survive in the treetops of the Solomon Islands.
• The northern subspecies, C. z. alfredschmidti, is smaller, with males averaging 24 inches (61 cm) and females 22 inches (56 cm), and its eyes have a black sclera and darker iris compared with the lighter-eyed common subspecies.
• Extensive logging, hunting for food, and the pet trade have driven the species onto CITES Appendix II, restricting international trade to protect the dwindling wild populations.

At a glance

About the Solomon Islands Skink

The Solomon Islands skink (Corucia zebrata) is a striking arboreal reptile, the largest living skink, reaching up to 32 inches (81 cm) in total length with a tail that makes up more than half its body. Its scales shimmer dark green, speckled with light brown or black, while the ventral surface ranges from pale yellow to green. A prehensile tail functions as a fifth limb, allowing the skink to swing through the upper canopy of rainforest trees, especially the towering strangler figs where epiphytic food plants grow. Males bear a broader head, a V-shaped scale pattern near the cloaca, and a slightly more slender silhouette than females; the two recognized subspecies differ in eye sclera color, scale size, and overall length, with the northern form (C. z. alfredschmidti) being smaller and darker-eyed. These herbivores graze on a diet of leaves, flowers, fruits, and even the calcium-oxalate-rich pothos plant, supplementing juvenile gut flora by consuming adult feces. Unusually for reptiles, they live in social groups called circuli, with both sexes defending territories and showing fierce, albeit brief, parental protection. Viviparous matrotrophy produces single, oversized newborns after a six-to-eight-month gestation, a size comparison once likened by a former Philadelphia Zoo curator to a human mother birthing a six-year-old. The young remain in the circulus for up to a year, learning the forest’s complex scent map before venturing out to establish their own arboreal families, a life cycle that intertwines communal care with solitary independence.

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