Fluffy and rare, a pair of newly hatched Te Anau takahē chicks will help bolster the species population nationally.
Department of Conservation Te Anau Bird Sanctuary ranger Kiri Klein said there were two pairs of resident takahē at the sanctuary, one pair with two 2-week-old foster chicks.
"Very cute, really hard to see because they are really good parents and secretive with their chicks, which is good because it keeps them safe."
The second pair had also just gone down to nest.
"We're hoping to get them a foster egg so they can raise a foster chick for themselves as well."
Once grown, the chicks will be transported to the Burwood Takahē Centre for a "boot camp" to learn how to be a takahē in a natural environment.
She described them as little black balls of fluff with legs and a grey beak. "Little puffballs."
Takahē Sanctuary sites ranger Phil Marsh said the takahē recovery team worked to build up the takahē population.
"Our main aim, ultimately, is to produce enough birds in captive environments to be able to release into wild populations."
Population numbers were about the 445 mark.
In the wild, takahē faced challenges such as predation, drowning and falling from heights such as cliffs.
He said they had been lucky in that about 80 per cent of takahē eggs had been fertile.
It was important to protect the species so as to "not lose them again" — they were "very nearly" lost in the mid 1900s.
"We want to ensure that in years to come every New Zealander can easily see a takahē on mainland New Zealand."
In the past five years, about five eggs had been hatched at the sanctuary, which had not been the resident pair's eggs.
As the species were culturally significant taonga, Ngāi Tahu had a close involvement in their recovery.