Fears are held for Kangaroo Island's endangered glossy black cockatoos with large parts of the bird's habitat destroyed by the bushfires.
An estimated 370 are believed to live on the island and congregate in seven main flocks.
Most of those are usually found within the 210,000-hectare fire zone.
Karleah Berris, from the cockatoo recovery program, said it was unclear how many were killed in the fires, but there had been some sightings.
"Two landholders have reported sightings of glossy black-cockatoos in some small she-oak patches that survived in burn areas, so we are hopeful that some flocks were able to survive the actual fire," Ms Berris said.
"When it is safe to do so, our first job will be to go out and survey the damaged sites and see what habitat remains in the burn areas."
Ms Berris said recovery actions would include installing new nest boxes to replace those destroyed by fire and planting she-oaks to provide additional food for the cockatoos.