If successful, the programme, which uses genetically modified hawks to target feral cats, may be expanded to other parts of the Otago catchment during the next 12 months.
The Institute of Environmental Science and Research project involved isolating genes from the genome of the world's largest raptor, the extinct Haast's eagle (Harpagornis moorei), to create recombinant DNA, which was then introduced to harrier hawk embryos.
A native of the South Island's West Coast until it became extinct about 1400, the Haast's eagle weighed up to 18kg and had a 3m wingspan.
Three of the raptors, which cost about $8000 each to raise and train, will be released at secret locations around Dunedin before noon today.
''It's very exciting. They've been trained using semi-domesticated cats, but they've never hunted in the wild before,'' Cat Limitation Aiding Wildlife (Claw) project leader Dr Felix Demodicosis said yesterday.
''The programme utilises the DNA of a formidable bird with predatory instincts. It's about modifying their feeding instincts, by making an alternative food source available. The beauty of it is that the offspring of these original birds will consider cats a food source from birth. If this works well with cats, we'll look at targeting other pest species, like possums.''
The programme is being monitored with interest overseas from government pest-control agencies and animal welfare organisations.
The birds had been trained to distinguish between feral and household cats, Dr Demodicosis said.
''We hope there won't be too much collateral damage, but it is a pilot project, so people should take sensible precautions. We'd advise people who do have cats to keep them inside for the next two months, while the birds adapt to their new environment.''
The birds have been fitted with an implanted microchip and GPS system, similar to that used to track royal albatrosses. The project follows a call-to-action campaign against feral cats led by philanthropist Gareth Morgan.
The Claw programme will be trialled until the end of the 2013-14 financial year.
- This story was the ODT's April Fools' Day prank for this year. - Ed
