A man is recovering in the John Hunter Hospital after he was bitten by what's believed to be a death adder.
The man in his 50's was bushwalking at Seal Rocks on Saturday morning when he was attacked.
He managed to walk for 20 minutes to Treachery Camp Ground where he was able to get mobile phone service and call for help.
He reported feeling nauseous, dizzy and hot.
The man was stablised by a Critical Care Team before being flown to hospital by the Hunter's Westpac Rescue Helicopter.
