There were around 50 people watching with anticipation as 10 little birds flew in to their new home at Bushy Park.
The endangered hihi (stitchbird) were transported from Tiritiri Matangi Island in the Hauraki Gulf to the Whanganui sanctuary and released on Sunday morning.
"Despite terrible weather over the past week, we have managed to catch the agreed number of birds and get them safely off the island," said Bushy Park manager Mandy Brooke.
The birds were transported to Whanganui by "translocation guru" Dr Kevin Parker.
"I transport them at night when they tend to be sleeping and the car is air-conditioned, has very good suspension and the windows are darkened so they experience minimal distress," he said.