The dumping came just a week after Waipapakauri residents were appalled to find a dozen dead mallards dumped on Ninety Mile Beach.
Fish and Game Northland manager Rudi Hoetjes said he was horrified by the incidents, saying it was a bad look for hunters.
"A few rogues like this ruin it for everybody," he said.
Mr Hoetjes said it angered him personally because he and his staff spent all year ensuring access to hunting areas, but irresponsible actions by a few could lead to a public backlash against hunters. The majority followed the rules, he said.
He urged anyone who saw game dumped or left in the field to take details such as vehicle registration numbers, and contact Fish and Game's Northland office on (09) 438 4135.
It was an offence under both the Wildlife and Conservation acts so Fish and Game would not hesitate to prosecute.
A few years ago a hunter was fined $1200 for leaving dead ducks in the water at Lake Owhareiti near Pakaraka.
By law dead game cannot be left in the field, nor can it be dumped. It has to be taken away and disposed of properly by burying or incineration.
Sometimes rogue hunters will remove the breast meat from a duck and leave the carcass behind. Far North District Council spokesman Richard Edmondson said dumping dead animals was an offence under general bylaws. However, prosecuting for a breach of the bylaw was costly and time-consuming.
The council was more likely to issue an infringement notice carrying a fine of $100-$400.
Dumping offal in a waterway is also an offence.