As Australia battles wildfires that have razed more than 4 million hectares (9.9 million acres) across five states, volunteers are trying to save wild animals caught in the inferno.

Australia's bushland is home to a range of indigenous fauna, including kangaroos, koalas, wallabies, possums, wombats and echidnas. Officials fear that 30% of just one koala colony on the country's northeast coast, or between 4,500 and 8,400, have been lost in the recent fires.

Authorities have no exact figure on how many native animals in total have been killed but experts say it is likely to be in the millions.