A Queenstown trust established last year to help create a "predator-free paradise'' around the wider Wakatipu is zeroing in on Lake Hayes.
The Wakatipu Wildlife Trust's focus for this year was to help new trapping groups get started to fill the gaps in conservation projects around the region aimed at restoring birdsong.
New Zealand's native birds are threatened by introduced predators such as rats, stoats and possums, and those around Lake Hayes are no exception.
Trust committee member David Penrose, of Queenstown, said there were already about 20 trapping groups established in the Wakatipu and their success rate had been "fantastic''.
"The success rate so far in terms of trapping for stoats and ferrets and rodents, it's really made a difference, and it's really rejuvenating birdlife around the district.''