In tree - no sighting. I'm proud to say this the first sound recording i've done on iNaturalist NZ. It took a few goes before i got it sorted - and inevitably the bird went quiet for much of the recording :-). However there is a little bit of screech at the beginning then quite a bit more at end.
I'm thinking that these are mahonia rather than barberry seedlings. Parents of both are nearby. This is the Mahonia adult.