Biosecurity officials are appealing to the public to help them track down a large number of angry birds on the loose in Auckland.
The Ministry for Primary Industries (MPI) has confirmed red-vented bulbul have been spotted in Mangere, Devonport and possibly on the Whangaparaoa Peninsula.
It's uncertain how many of the birds are out there.
MPI Response Manager Jaap Knegtmans said red-vented bulbul are aggressive pests that have developed a reputation as one of the world's most invasive birds.
There are concerns the bird will damage Auckland's horticultural industry, native vegetation, birdlife and private gardens.