Invasive animals can have a wide range of impacts in natural systems. The introduced Asian house gecko Hemidactylus frenatus has invaded widely in Australia, but is largely restricted to human-altered landscapes. Hoskin (2011) has argued that H. frenatus has the potential to negatively impact Australian ecosystems by invading natural habitats. We examine this contention by reviewing an extensive standardised fauna survey dataset collected in northern and central Queensland during the key period of H. frenatus expansion from the 1990s to 2012. In light of these data we also re-examine data from other areas that suggest H. frenatus is a benign threat and is unlikely to become an environmental pest within Australia. On current evidence, we conclude that H. frenatus is unlikely to spread much beyond areas of human influence.
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Vol. 60 • No. 6