A reward offered for confirmation the South Island kokako is still alive has been doubled to $10,000.
The initial $5000 reward offered in January by the South Island Kokako Charitable Trust generated 40 reports of possible encounters, and interest from around the world.
The bird was considered extinct until 2013 when credible sightings, including on the West Coast, prompted it to be reclassified.
The trust announced today the Morgan Foundation had matched the $5000 reward.
To claim the $10,000, claimants must provide the evidence needed to confirm the continued existence of the bird.
Morgan Foundation trustee Jessi Morgan said if the move encouraged more people to join the search and enjoy native forests, "we'll be delighted with the outcome".