Hi,
Here is another hybrid Goose I found on the internet. I don't have enough time to give a suggestion about the parents of this bird. However, it seems rather dark on the flanks and his head suggests Snow Goose. The bill is long, perhaps too long for Branta species?
http://www.digiscooppix.nl/album_page.php?...d=9200&recent=1 (http://www.digiscooppix.nl/album_page.php?pic_id=9200&recent=1)
Looks like Anser caerulescens x Branta canadensis!
there are some photos from norway which show exactly similar birds (Oslo-Ostensjovannet, i think).
EDIT-The ostensjovannet birds I had in mind and some others also seem to be Barnacle x snow... it seems that can loook quite similar to a few canada x snow?!