Why was the New Zealand tui known as the "parson bird"? Who gave it this name?

The Tui has a small tuft of white feathers on its throat which stand out against darker feathers around it. This looks remarkably like a parson's white collar. Exactly who was the first early European to name the bird the parson bird is not recorded in history, but it was likely a member of Captain Cook's crew who would have been the first Europeans to have seen the bird and a parson to make the connection.

It is interesting that the birds will drink so much nectar they will get drunk and start singing in a boisterous way.

https://nzetc.victoria.ac.nz/tm/scholarly/tei-BesFore-t1-body-d2-d6-d13.html