Underwoodisaurus Milii - Description

Description

Thick-tailed geckos are reddish-brown with bands of white and yellow spots and paler underbelly. They usually grow to 120–140 mm in length. Their original tail is black with several pale bands, however regenerated tails have little pattern. When threatened, they will arch their backs and "bark". Thick-tailed geckos are found in rocky outcrops across southern Australia, and are slightly more cold-tolerant than many other Australian gecko species. They are nocturnal, and shelter underneath rocks or in burrows during the day. They feed on insects and small vertebrates.

Unusually for reptiles, this species forms aggregations in their retreat sites during the day. The reasons for this are unknown. However, it has been shown that this behavior results in a higher aggregate thermal inertia (they stay warmer) than would be found in solitary geckos of this and related kinds in similar circumstances. In the same source, it was suggested that aggregating for physiological benefits may precede the development of other kinds of social behavior.

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