do they take shelter in trees?
Yes, they favor old stands of Eucalyptus.
Australian green tree frog
 They favour old stands of "Eucalyptus", where the trees have hollows in which water collects. 
which regions will you find the australian green tree frog? Australia and New Guinea which places in these regions do they dwell in? Western Australia through the Northern Territory and Queensland to north and central New South Wales. what is the scientific name for these species? Ranoidea caerulea what do they feed on? Moths, cockroaches, and locusts
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Australian green tree frog [SEP] Distribution and habitat
They are often found in the canopy of trees near water bodies, but also occupy terrestrial habitats well away from water. They favour old stands of "Eucalyptus", where the trees have hollows in which water collects. They are common along inland waterways and can survive in swamps (among the reeds) or in grasslands in cooler climates.