Fish and Game rangers will be out in force this weekend to ensure duck hunters do not jump the gun and break the ban on hunting.
The first Saturday in May is traditionally the opening of the game bird season, but the Government decided last week to delay it to support efforts against Covid-19.
Fish and Game chief executive Martin Taylor said the season would now open on the second Saturday following the introduction of alert level 2 - unless that date fell on Queen's Birthday Weekend.
This was to avoid a clash with Moving Day on June 1, when large numbers of farmers shift to new farms.