I made an observation of a Canada Goose, which was grazing in a zoo (link observation). I made this observation because the goose did not belong there, it is not part of the bird collection in the zoo (link zoo), and it was grazing in a walibi pen. I did not know about the introduction of the Canada Goose in the Netherlands, now I do. But reading the page of the Dutch Bird Protection ngo, there are lots of wild Canada Goose pairs in the Netherlands (1200 pairs in 2000 and rapidly increasing in numbers according to the Dutch Bird Research (sovon.nl), descending from escaped ones. I thought wild invasive species should be ‘research grade’ like some turtles I found in a local park. Yet two people stated that the pictured goose is not wild. Who is right and what should I do when I am right and the goose is wild?
Thanks in advance for any answer, positive or negative.