"We have also seen an increase in the number of farmer complaints about high duck numbers causing crop damage," Mr Hadland said.
The feedback "points to what should be a vintage season".
However, duck-shooters' success depended on weather conditions.
The forecast across most of Otago tomorrow was for fine and calm weather, which might favour the ducks.
"Everyone should get a few for the table tomorrow and it is a three-month season."
Gamebird hunting licence sales were up 10% on the same time last year, he said.
The increase could be a result of "excited" duck-shooters getting prepared earlier.
"Duck-shooters seem better organised this year. That's probably related to the positive prospects for the season."
Otago Coastal area prevention manager Inspector Kelvin Lloyd said police wanted duck-shooters to remember basic safety rules before leaving for the mai mai.
Safer shooting
• Always identify the target and be aware of where the shot will travel.
• Treat every firearm as loaded and ensure it is pointed in a safe direction.
• Alcohol consumption should only start when the duck-shooting has finished.
• Firearms must always be secured against theft, especially if the owner does not have "direct oversight".
• Always seek the permission of the property owner before shooting on their land.
shawn.mcavinue@odt.co.nz