Data from the 2019 survey was used to develop a wild deer management program that successfully removed more than 600 deer from the Vittoria area.

The deer were competing for feed during the drought and damaging fences, and it was feared they could become a serious road safety hazard on the Mitchell Highway between Bathurst and Orange.

Local Land Services senior biosecurity officer Kristy Bennetts said the chopper would search for feral pigs, foxes, wild deer and wild dogs across 155,000 hectares from Saturday through to the end of May.

"Pest animals predate on native species and livestock, compete for feed and water, spread disease and damage the environment," she said.

"This survey will help us identify population hot spots and give us the information we need to prioritise field work control options."

The proposed flight map will be posted the LLS website at www.lls.nsw.gov.au/centraltablelands.