More than 300 baby flying foxes have been abandoned in a "starvation event" on NSW's South Coast as their desperate mothers leave them behind in order to survive.

The devastating drought and fires have hit wildlife habitats so hard experts believe human intervention will be needed to repopulate sensitive species that will otherwise be wiped out locally.

Experts warn drought and bushfires have combined to create a new level of threat to local wildlife. Credit:Nine

Wildlife Rescue South Coast secretary Jenny Packwood said large numbers of flying foxes flew south in spring, after early season fires on the North Coast wiped out large areas of their northern habitat, looking for fruit and nectar in forests between Nowra and Batemans Bay.

“Mothers are abandoning babies at two weeks after birth, because there is no food for them. We’ve picked them up out of local colonies. Last week we had 300 come in, and we’ve been flat out feeding since then. We had to fly some of them to the North Coast, to carer groups up there,” Ms Packwood said.