Almost 3 billion koalas, kangaroos and other animals are estimated to have been killed or displaced in the 2019-2020 Australian 'Black Summer' bushfires.
The figure has jumped from the initial 1 billion estimation after researchers took into account Kangaroo Island, East Gippsland and North-East Victoria.
The WWF funded analysis estimates the catastrophe is likely to push some species into extinction.
University of Sydney professor Chris Dickman, who coordinated the study, said the revised figure is still conservative, as some animals like turtles and fish are not included due to a lack of baseline data on the species' densities.
Photo of SA bushfires, NASA