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Monitors & Geckos Monitors & Geckos

Overview

There are fives groups of lizards in the Canberra region: monitors, geckos, dragons, legless-lizards, and skinks. Monitors, also known as goannas, and geckos are described here. There are two species of each in the Canberra region.

Worldwide monitors belong to the single genus Varanus which comprises are 78 species. Monitors are very distinct from other reptiles and like snakes have a forked snake. There are two monitors in the Canberra region. Rosenberg’s is a ground dwelling monitor while the Lace Monitor is often found in trees. Rosenberg’s is a lightish brown with orange bands, whereas the Lace Monitor is darker in colour, but also with bands, with a few very broad bands on the second half of its tail.

Worldwide, there are some seven families of geckos (Gekkota) comprising 1500 species largely living in the tropics. Australian geckos belong to the families Diplodactylidae, Carphodactylidae and Gekkonidae. In the Canberra region, there are only two species, Southern Marbled Gecko (Christinus marmoratus), belonging to family Gekkonidae, and Eastern Stone Gecko (Diplodactylus vittatus) family Diplodactylidae.

Geckos are easily recognised, being mostly nocturnal with soft bodies and tiny granular scales. They have well-developed limbs with five digits, large eyes with vertical pupils, no eyelids, and broad fleshy tongues. In the absence of eyelids, the tongue is used to lick the eye clean. 

Geckos are amazing animals, characterised by their amazing colour patterns, ability to vocalise (using chirping sounds in social interactions with other geckos), adhesive toe pads (being able to adhere to almost any surface), lack of eyelids (instead have a transparent membrane which they lick to clean), spectacular colour vision (350 times more sensitive than human colour vision and sensitive to UV, blue, and green), being ‘polyphyodont’ (teeth are constantly replaced), and ‘autonomy' (ability to can lose their tails in defence). They are nocturnal.

A standard measurement in the description of reptiles is the snout-vent length (SVL) which is measured from the tip of the nose (snout) to the anus (vent), and excludes the tail. This may be a helpful in distinguishing various species of goannas and geckos.

Monitors & Geckos - 6 species

Monitor/Gecko Christinus marmoratus (Southern Marbled Gecko)

Christinus marmoratus
Christinus marmoratus
Christinus marmoratus
Christinus marmoratus
Christinus marmoratus
Christinus marmoratus

Monitor/Gecko Diplodactylus vittatus (Eastern Stone Gecko)

Diplodactylus vittatus
Diplodactylus vittatus Recently shedded old skin visible
Diplodactylus vittatus
Diplodactylus vittatus
Diplodactylus vittatus
Diplodactylus vittatus

Monitor/Gecko Phyllurus platurus (Southern Leaf Tail or Broad-Tailed Gecko)

Phyllurus platurus
Phyllurus platurus

More information

Monitor/Gecko Varanus rosenbergi (Rosenberg's Monitor)

Varanus rosenbergi
Varanus rosenbergi
Varanus rosenbergi
Varanus rosenbergi
Varanus rosenbergi
Varanus rosenbergi

Monitor/Gecko Varanus sp. (genus) (A goanna)

Varanus sp. (genus)
Varanus sp. (genus)
Varanus sp. (genus)
Varanus sp. (genus)
Varanus sp. (genus)
Varanus sp. (genus)

Monitor/Gecko Varanus varius (Lace Monitor)

Varanus varius
Varanus varius
Varanus varius
Varanus varius
Varanus varius
Varanus varius

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