A campaign to rid the Nelson Tasman region of the great white butterfly has already netted great results.
The Department of Conservation last month launched a butterfly bounty, offering $10 to anyone who catches one of the pests.
So far keen hunters have captured 47 great white butterflies, with nearly 1000 of the smaller white butterflies also handed in.
It is part of DoC's programme to eradicate the butterfly, as it poses a major threat to home and commercial brassica crops and endangered native cresses.