National Parks and Wildlife Service ranger Steve Woodhall said staff and volunteers from the Orange Field Naturalist and Conservation Society captured the results across several surveys after the 2018 fire burned through more than 70 per cent of the state conservation area.

"While this fire impacted the park heavily, two years later we have emerged with new knowledge about what exists in this unique ecosystem," he said.

"In total 79 new species have been recorded in the park including birds, reptiles mammals, amphibians invertebrates, plants and fungi."

Mr Woodhall said the total number of known flora and fauna species had risen to more than 950 species after 1200 volunteer hours.

Among them are the antechinus, an Australian marsupial resembling a mouse, a bright yellow worm called a striped planarian and the flame robin.

Some, including the Canobolas leaf orchid, the pink spider orchid and the silver leaf candlebark, are found nowhere else.

Personnel monitored spring and autumn vegetation across 24 sites, as well as specific surveys on the orchids, heath plants, insect-eating bats and Aboriginal sites.

"While the park is only in the early stages of recovery, it is pleasing to see the animals and insects slowly returning to the burnt areas," Mr Woodhall said.

"The trees are sprouting new growth, the ground vegetation is coming back and I'm glad to see that the special species have survived the fire."

Mr Woodhall said the mountain was currently home to 13 state and federally listed threatened species and endangered ecological communities, but the work had identified another 22 for potential listing.