Entire species might need to be reclassified following devastating bushfires, with flying foxes and koalas some of the worst-affected, according to Australia Zoo.

The number of injured and abandoned animals is so great that Australia Zoo Wildlife Hospital's rehabilitation centre is being transformed into a creche for 350 orphaned grey-headed flying foxes.

Bushfire-affected flying foxes in care at Queensland's Australia Zoo Wildlife Hospital. Credit:Australia Zoo

Australia Zoo Wildlife Hospital director Dr Rosie Booth said vulnerable species would be pushed into extinction by the bushfires and it would take decades for those animals and plants to recover.

"We may need reclassification of a number of species following the catastrophic bushfires; the grey-headed flying foxes and koalas are in a lot more trouble now than they ever have been before and their survival will be much more conservation dependent," she said.