Undated photo shows a kokako in the woods in New Zealand. Recovery efforts over more than two decades have seen the North Island kokako, one of New Zealand's most iconic birds, brought back from the brink of extinction, New Zealand's Conservation Minister Kiri Allan said Friday. The kokako makes up two species of endangered forest birds which are endemic to New Zealand, the North Island kokako and the presumably extinct South Island kokako. (New Zealand's Department of Conservation/Handout via Xinhua)

Photo taken on March 26, 2021 shows a New Zealand's 50 note featuring kokako pattern. Recovery efforts over more than two decades have seen the North Island kokako, one of New Zealand's most iconic birds, brought back from the brink of extinction, New Zealand's Conservation Minister Kiri Allan said Friday. The kokako makes up two species of endangered forest birds which are endemic to New Zealand, the North Island kokako and the presumably extinct South Island kokako. (Xinhua/Lu Huaiqian)

This undated photo shows a kokako in the woods in New Zealand. Recovery efforts over more than two decades have seen the North Island kokako, one of New Zealand's most iconic birds, brought back from the brink of extinction, New Zealand's Conservation Minister Kiri Allan said Friday. The kokako makes up two species of endangered forest birds which are endemic to New Zealand, the North Island kokako and the presumably extinct South Island kokako. (Photo by David Cook/Xinhua)