A flock'a'tiels.

A group of cockatiels is simply known as a flock.

The sulphur-crested cockatoo, native to Australia, is not at all endangered.

A permit is not required to keep a sulphur crested cockatoo anywhere in Australia.

The sulphur-crested cockatoo, which is an introduced species in New Zealand, is found on both the North and South Islands.

To see where they are found, click on the related link below, and select the "sulphur crested cockatoo" button on the map.

Yes galahs and sulphur crested cockatoos are known to mate