Byrd wrote:Do you have links to these two checklists with Blue Ducks?
There are all sorts of dodgy species listed under Zealandia on ebird, including things like Brown Quail, Spotted Dove, Golden Pheasant, Wild Turkey, and Tomtit. Blue Duck seems like one of the dodgiest.
They are checklists from a visiting American birder:
https://ebird.org/checklist/S122108053
https://ebird.org/checklist/S122330662
Tomtits do actually turn up occasionally: https://ebird.org/checklist/S77210048