Great Spotted Kiwi (GSK) is the largest of the kiwi species (growing to about 45cm in height) and the only kiwi found in Canterbury. With an estimated population of 14,000, its future is far from secure with an estimated decline rate of 2%p.a.
Before European settlers arrived, there were about 12 million GSK. The introduction of predators such as rats, ferrets, stoats, possums, pigs, cats, dogs and hedgehogs, along with habitat degradation, has dramatically reduced the population.
In 2007 the first three GSK eggs and one wild chick were brought to the Trust's kiwi breeding facility in Christchurch as part of the BNZ Operation Nest Egg programme.
As of 2013/14 the number of GSK eggs/chicks managed at the facility has increased to 91.
Over the years these eggs and chicks have been retrieved from the Hawdon Valley, Paparoa Ranges and the Stockton Plateau. Once the young chicks are eating well and have reached 450 - 500 grams they are released into the 'Bois Gentil' inland creche site in the Paparoa Ranges.
After a period of approximately one year at the creche site the young chicks are big enough to protect themselves from the majority of predators and are released back into the wild. The release sites vary between the Paparoa's, Nelson Lakes, Hawdon Valley and the Nina Valley.
Historically the Nina Valley was home to a population of GSK. However, on investigation, it was discovered that there no longer were any kiwi in this region. An extensive trapping programme began in 2008, monitored by the students of Hurunui College. Young adult kiwi from the programme have now been released back into the Nina Valley, with plans for a wild to wild translocation of GSK to increase genetic diversity of this new population.