Thanks to Shorty and to Jack for the information that ebird lists them as Greylag Goose
Anser anser.
I must admit that I have long since lost the ability to integrate the various lists but I note in this context that the Birdlife Working list includes the Canada Goose with the status of 'vagrant (from NZ introduction) but does not list the Greylag.
https://birdlifephotography.org.au/index.php/resources/taxonomy?start=0&order=taxon_sort+asc&object_id=0&other_id=0&action="">
Further, I note that the 'Feral Goose' Anser anser domesticus is listed for King Island.
https://en.wikipedia.org/wiki/List_of_birds_of_King_Island_(Tasmania)
For a while on our farm in West Gippsland we had a dozen or so 'feral domestic geese' living free. They nested but the foxes always got all the progeny and (illegal) hunters eventually shot the adults.
regards
Con