Egernia whitii

White's Skink (Liopholis whitii)

White's skink, scientifically identified as Liopholis whitii and formerly referred to as Scincus whitii, is a species of lizard belonging to the skink family, Scincidae. First described in 1804 by Bernard Germain de Lacépède, this species is endemic to Australia, with a notable presence in south-eastern regions, including Tasmania and numerous islands within the Bass Strait.

Habitat and Distribution

The natural habitats of Liopholis whitii encompass forests, shrublands, and rocky environments, typically found at elevations ranging from sea level up to 1,200 meters. The species shows a preference for areas with rocks and shrubby heathland that have experienced minimal environmental disturbance. Its widespread distribution across south-eastern Australia makes it a common sight in these suitable terrains.

Physical Characteristics

Liopholis whitii is characterized by its stocky build and slow growth rate, maturing into a medium-sized lizard. Adults typically reach a snout-to-vent length (SVL) of approximately 90 mm (3.5 inches), with both sexes achieving sexual maturity around 75 mm SVL, often by three years of age, though this can be accelerated in captivity. The coloration and patterns of White's skink are highly variable. Base colors for the central stripe can range from grey to brown or red. The flanks are adorned with black and white rosettes against a grey to brown background, while the underbelly displays a pale peachy-orange hue that intensifies towards the tail and limbs. The dorsal side usually features three bars, with a solid brown central bar bordered by black bars containing white spots. The head and tail are generally brown with minimal patterning and subtle scale outlines. Many individuals also possess distinctive black stripes along their lips, extending from their yellow-lined eyes.

Behavior and Diet

White's skink exhibits complex behavioral traits. It is a burrowing species that constructs or utilizes existing tunnels with multiple entrances for escape. Socially, it is polygynous, with small family groups often consisting of up to five females per male, though females may mate with males outside their group. This species is notably aggressive, frequently attacking unfamiliar individuals, including potential rivals or even juveniles it does not recognize, and can engage in cannibalism. Research indicates that both males and females can differentiate between related and unrelated individuals, often favoring association with related members of the opposite sex. Their diet is omnivorous, comprising meat, insects, and plant matter, with occasional consumption of berries like strawberries and raspberries.

Reproduction

Reproduction in Liopholis whitii is viviparous, meaning they give birth to live young. Mating typically occurs in September and October, with females giving birth in late January or February over a period of two to ten days. Litter sizes usually range from one to four offspring. The juveniles are highly aggressive from birth and compete amongst themselves. They remain within the family group for protection until they reach about half the size of an adult, at which point they are typically driven out by the adults. While avoidance of inbreeding is generally favored to maintain offspring quality, studies on natural populations suggest that under certain conditions, it may not always be the optimal strategy.