NSW producers are spending thousands of dollars on ammunition and shooting up to 1000 deer a year as populations continue to fluctuate at an alarming rate.
Landcare recently held workshops across the New England featuring deer expert Stuart Boyd-Law who labeled the current invasion close to state wide.
"They are spread right through the Great Divide from south east Queensland down to Kosciuszko, any of that tablelands country through the New England Tablelands and Central Tablelands right down into the Kosciuszko and that Cooma area," he said.
"Then they are breaking out to the east and west of that so there is a lot of deer in coastal areas in behind Coffs Harbour and Port Macquarie, a lot of deer west of Dubbo, out near Cobar and Nyngan.
The only real places you would call deer free are probably far western NSW."
Under the Game and Feral Animal Control Act, wild deer are classed as a 'game animal' restricting the abilities to manage them in comparison to other pests.
Those wanting to hunt deer must hold a NSW Game Hunting Licence and abide by special conditions.
In November last year hunting rules were relaxed allowing deer to be hunted year-round rather than seasonally and permit lures and decoys.
But Mr Boyd-Law said it was time that broadscale control techniques were introduced.
"In some areas I think some producers are shooting over 1000 a year on some places," he said.
"Personally I think the legislation is a waste of time.
"The trouble is with deer there is the hunting fraternity side and then there is the pest animal side, even if there was a broadscale control technique available for deer there would still be plenty of deer for hunters.
"I think people need to realise that sooner rather than later otherwise the numbers are just going to get worse."
Local Land Services have trialled aerial shoots against invasive species with a program in the Upper Hunter in November controlling 1938 deer.
In 2018 alone, more than 4200 deer and 2400 pigs were controlled in the area.
Kings Plains producer Angus Vivers is battling a wild deer invasion with spotlighters killing between six to eight each week and sighting up to 70 in a mob.
"We have just got to keep at them," he said.
"It costs us probably $2000 to $2500 in ammunition for our feral animals and kangaroos. We keep up to the pigs, the foxes, and dingos too."
A fellow New England grazier said it wasn't uncommon to see deer in mobs of up to 100.
"Our biggest problem is they eat us out," he said.
"I would think that most of the time we are running at least probably one deer to the acre."