The Green and Golden Bell Frog Litoria aurea has undergone a dramatic population decline in New South Wales. During this time the species' status in this state has changed from being common in the 1960s to endangered in 1992. To assess the present population numbers and environmental pressures, 31 sites within the Greater Sydney region and 61 sites from regional areas of New South Wales were surveyed. The sites consisted of previously known but no longer used localities prior to 1990, as well as more recently discovered localities. Since 1990, only 38 localities have been recorded for Green and Golden Bell Frogs, 19 of these are in the Greater Sydney region. Since the 1960s Green and Golden Bell Frogs have disappeared completely from all highland areas above 250 m a.s.l. Coastal populations have been reduced in number and are more isolated from other extant populations. Many of the extant sites are new sites (post 1990) for this species and occur in highly disturbed environments. The ecological niche of this species is discussed in the light of new observations on these frogs. The introduction of Mosquito Fish Gambusia holbrooki may be one of the factors limiting the recovery of Green and Golden Bell Frog populations in New South Wales.
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