Of 280 kiwi monitored (radio-tagged) through 1080 operations in the Tongariro Forest Park from 2007 to 2011, none were lost to 1080.
Of the 280, 64 died, either through predation by stoats or ferrets, assumed predation, or misadventure. Click for full details
Kiwi chick survival more than doubled in Tongariro Forest in 2006 after a dramatic reduction in pest numbers following a 1080 operation.
Field trials have demonstrated that aerial 1080 operations are far more effective in protecting kiwi than the labour-intensive process of trapping and hand-rearing chicks that had previously been the main strategy to save kiwi.
Since 2008, 145 kea have been monitored by DOC through ten 1080 operations, with 20 recorded deaths.
Recent losses (Otira 2013) occurred during part of a research programme (pg.46 of link) testing various types of bird repellents. While the results were very disappointing, tracking work had shown that 60% of kea nests were attacked by predators, and benefits from 1080 pest control are considered to continue to outweigh the losses.
Research to develop an effective repellent to prevent kea deaths is continuing.
The acutely threatened kokako was pushed to the brink of extinction by possums and rats.
Without predator control, most female kokako are killed (pg.39) while sitting on the nest.
Over 8 years, aerial 1080 effectively ‘rescued’ kokako, reducing predation to the point where 50% of nests (pg.38) were able to produce young.
Other native bird species
Many other native bird species, including kiwi, tomtits, whio, kakariki and mohua have been protected and their populations increased following 1080 (pg.37, footnote 88) operations.
Studies (p.32) have shown many species of native plants and trees show significantly better growth and survival after an aerial 1080 operation.
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