Environmental devastation of bushfires could span decades - Expert

An injured brushtail possum retrieved from bushfires in Penrith, near Sydney Source: AAP

More than one billion animals are thought to have been killed in bushfires across Australia but experts warn the environmental devastation could span decades or longer.

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Bats, frogs and invertebrates haven't been included in the estimate of one billion which experts say is almost certainly an underestimate because of the groups it does not include.