The partnership between Forest and Bird and Auckland Council has created habitat suitable for rare and endangered birds to be released into areas where pests had previously wiped them out.
Thanks to volunteers, three species - kokako, whiteheads and robins - can be taken from island sanctuaries in the Hauraki Gulf and liberated in the Waitakeres.
The Ark in the Park volunteers are co-ordinated and trained by several fulltime Forest and Bird staff.
"It's positive work, because the volunteers feel like they are really making a difference," says Ark in the Park project manager Gillian Wadams. "They enjoy the outdoors, learning about conservation and liaising with park users, such as trampers. There's a fair bit of camaraderie, with a barbecue put on for them at the conclusion of their hours out working in the bush."
Volunteers work on Thursdays, the first three Saturdays and the last Sunday of the month.
For more information email nature.project@forestandbird.org.nz