Carinascinus metallicus
The Metallic Skink (Carinascincus metallicus) is a viviparous lizard endemic to Australia, primarily found in Tasmania and southern Victoria. It is characterized by its metallic-scaled dorsal surface, which exhibits a range of colorations and patterns, and it gives birth to live young. This adaptable species inhabits diverse environments from coastal dunes to sclerophyll forests and woodlands, relying on basking to regulate its body temperature.
Key Facts
- ›Endemic to Australia, with its stronghold in Tasmania.
- ›Gives birth to live young (viviparous).
- ›Possesses a metallic sheen on its dorsal scales, giving it its name.
- ›Diet consists primarily of small invertebrates.
- ›Can shed its tail (autotomy) as a defense mechanism.
- ›Highly variable in color and pattern, possibly representing a complex of species.
Metallic Cool-Skink, Metallic Skink
Australia, Tasmania, Southern Victoria, Bass Strait Islands
Coastal Dunes, Heathlands, Dry Sclerophyll Forests, Wet Sclerophyll Forests, Woodlands
- Typically Brown With Pale Or Dark Streaks, Sometimes Forming Longitudinal Stripes.
- Dorsal Scales Possess A Metallic Sheen.
- Underside Is Usually Grey Or White With Dark Spots On the Throat, Chest, and Tail.
- Belly and Lower Tail Can Have An Orange Or Pink Hue.
- Adult Length Up To 63 mm.
- 24–28 Rows of Keeled Scales At Mid-Body.
- Dark Eyes.
- Movable Lower Eyelid With A Transparent Disc.
- Ear Opening Is Similar In Size To the Eye Opening.
Small Invertebrates, Arthropods
- Diurnal Heliotherm .
- Primarily Ground-Dwelling But Climbs Rocks and Logs To Bask.
- Shelters Beneath Rocks Or In Decomposing Logs During Inactive Periods.
- Active Forager.
- Uses Cryptic Coloration, Rapid Movement, and Sheltering To Evade Predators.
- Capable of Tail Autotomy For Escape.
Birds, Snakes, Cats
About Carinascinus metallicus
The Metallic Skink (Carinascincus metallicus)
The Metallic Skink, scientifically classified as Carinascincus metallicus, is a species of skink native to Australia, with its most significant populations found in Tasmania, where it is the most common lizard. It has also established a presence in southern Victoria and on numerous islands within Bass Strait. This species is easily identifiable by the distinctive metallic sheen on its dorsal scales, which contributes to its common name. Its coloration is highly variable, typically appearing brown with streaks or stripes, and its underside can range from grey or white to hues of orange or pink.
Description and Habitat
Adult Metallic Skinks can reach a length of up to 63 mm. They possess 24 to 28 rows of keeled scales around their mid-body, dark eyes, and a transparent disc on their movable lower eyelid. The species thrives in a variety of habitats, including coastal dunes, heathlands, and sclerophyll forests and woodlands, often preferring cooler temperate zones. It is a diurnal heliotherm, meaning it relies on sunlight to regulate its body temperature and is often observed basking on rocks and logs. During cooler periods or at night, it seeks refuge under rocks or within decaying wood.
Reproduction and Life Cycle
A notable characteristic of Carinascincus metallicus is its viviparous reproductive strategy; it gives birth to live young rather than laying eggs. Mating typically occurs in autumn, with females storing sperm over winter for fertilization in the spring. Gestation lasts for approximately 18 weeks, culminating in the birth of 1 to 8 offspring during the summer or early autumn. The thermal environment during embryonic development plays a crucial role in shaping the traits of the offspring, influencing their size, mobility, and behavior, which in turn impacts their survival prospects.
Diet and Defense
The Metallic Skink's diet consists mainly of small invertebrates and arthropods, which it actively forages for. Its predators include birds, snakes, and introduced mammals such as cats. To evade these threats, the skink employs camouflage, swift movements, and the ability to shelter quickly. A remarkable defense mechanism is its capacity for tail autotomy, where it can shed its tail to distract a predator, allowing for escape. While tail shedding incurs an energetic cost and affects mobility, the tail regenerates over several months.
Source: Wikipedia ↗
Frequently Asked Questions
What is the Metallic Skink's scientific name?
The scientific name for the Metallic Skink is Carinascincus metallicus. It is sometimes referred to as the metallic cool-skink.
Where is the Metallic Skink found?
Carinascincus metallicus is endemic to Australia, with its primary distribution in Tasmania, including offshore islands in Bass Strait. It has also expanded its range into southern Victoria.
What does the Metallic Skink eat?
The Metallic Skink is an active forager with an arthropod-based diet. It feeds on a wide variety of small invertebrates and insects.
How does the Metallic Skink reproduce?
This species is viviparous, meaning it gives birth to live young. Mating occurs in autumn, with females storing sperm over winter and giving birth to 1-8 offspring in the summer or early autumn after an approximately 18-week gestation.
What are the main predators of the Metallic Skink?
The Metallic Skink is preyed upon by various animals including birds, snakes, and introduced predators like cats. It uses cryptic coloration, rapid movement, and sheltering to evade them.
What is the typical size of an adult Metallic Skink?
Adult Metallic Skinks can grow up to 63 mm in length. This measurement typically refers to the snout-to-vent length.
How does the Metallic Skink regulate its body temperature?
As a diurnal heliotherm, the Metallic Skink relies on external heat sources, primarily sunlight, to regulate its body temperature. It basks on rocks and fallen logs and seeks shelter during inactive periods.
Related Lizards
Morethia boulengeri
Morethia boulengeri, commonly known as Boulenger's skink, is a small, insectivorous lizard endemic to Australia. It is characterized by its grey or brown dorsal coloration with darker flecks and a white ventral side, often featuring distinctive stripes. This adaptable species inhabits a variety of semi-arid and arid environments across the Australian mainland.
Ctenotus robustus
The Ctenotus robustus, commonly known as the eastern striped skink, is a large, fast-moving skink native to Australia. It is characterized by a distinctive white-edged black stripe running down its back and tail, set against a brown background with broader brown stripes and rows of white spots on its sides. This diurnal reptile prefers open habitats with available shelter and is widely distributed across various Australian states.
Zootoca
Zootoca is a genus of lizards belonging to the family Lacertidae. The genus currently contains two recognized species: Zootoca vivipara, commonly known as the viviparous lizard, and Zootoca carniolica. These lizards are found across various habitats, with Z. vivipara being notable for its widespread distribution and ability to reproduce via live birth.