Vets and volunteers treat koalas at Kangaroo Island Wildlife Park on Kangaroo Island, southwest of Adelaide, Australia, January 10, 2020. At the Kangaroo Island Wildlife Park in the South of Australia, veterinarians and nurses are working around the clock to tend to the burnt wounds of koalas. AAP Image/David Mariuz/via REUTERS

A koala stands in the field with bushfire burning in the background, in Kangaroo Island, Australia January 9, 2020 in this still image obtained from social media. The koala is facing a possible decimation in numbers due to the raging inferno that spread across various states within the past months. PAUL STANTON - PAUL'S PLACE WILDLIFE SANCTUARY/via REUTERS

A koala drinks water offered from a bottle by a firefighter during bushfires in Cudlee Creek, south Australia, December 22, 2019, in this picture obtained from social media. Picture taken December 22, 2019. Some estimates by experts put the number of animals killed, including domestic pets and livestock, at as high as half a billion, with potentially hundreds of thousands of injured and displaced native wildlife. OAKBANK BALHANNAH CFS/via REUTERS

Vets and volunteers treat koalas at Kangaroo Island Wildlife Park on Kangaroo Island, southwest of Adelaide, Australia, January 10, 2020. So far, about 30,000 koalas were estimated to have died from the fires on Kangaroo Island, according to Hall. But he and other veterinary staff are determined to save as much koalas as they can, to nurse them back to full health so that they can ultimately be released back into the wild. AAP Image/David Mariuz/via REUTERS

An injured juvenile koala rests at the emergency response wildlife shelter in Mallacoota, Victoria, Australia January 10, 2020. Picture taken January 10, 2020. At the Kangaroo Island Wildlife Park in the South of Australia, veterinarians and nurses are working around the clock to tend to the burnt wounds of koalas. REUTERS/Tracey Nearmy

An injured juvenile koala rests at the emergency response wildlife shelter in Mallacoota, Victoria, Australia January 10, 2020. Picture taken January 10, 2020. Some estimates by experts put the number of animals killed, including domestic pets and livestock, at as high as half a billion, with potentially hundreds of thousands of injured and displaced native wildlife. REUTERS/Tracey Nearmy