http://waarneming.nl/wn_details.php?id=3077744 (http://waarneming.nl/wn_details.php?id=3077744)
De donkere onderstaartdekveren verraden keizergans invloeden. De bredewitte kol, die ver over de kruin doorloopt en de gele oogring hinten naar dwerggans.
CiteerDe donkere onderstaartdekveren verraden keizergans invloeden. De bredewitte kol, die ver over de kruin doorloopt en de gele oogring hinten naar dwerggans.
As well as the quite small bill.
so I think the most likely ID is erythropus x canagicus
I can not 100% exclude albifrons x canagicus but I think it ios not very likely, the ones i have seen have a longer bill.
Emperor x greater whitefront for comparison:
Two siblings:
http://www.pbase.com/marvbreece/image/57944638 (http://www.pbase.com/marvbreece/image/57944638)
http://www.pbase.com/marvbreece/image/57944639 (http://www.pbase.com/marvbreece/image/57944639)
It's not about this hybrid, but dark spots on the undertailfeathers also seems to occur in blue phase snow goose. So the fact that a bird shows dark undertailspots doesn't seem te be an excluding character:
http://www.carolinanature.com/birds/snowgeese.html (http://www.carolinanature.com/birds/snowgeese.html)
Third foto
CiteerIt's not about this hybrid, but dark spots on the undertailfeathers also seems to occur in blue phase snow goose. So the fact that a bird shows dark undertailspots doesn't seem te be an excluding character:
http://www.carolinanature.com/birds/snowgeese.html (http://www.carolinanature.com/birds/snowgeese.html)
Third foto
Yes, that is true about blue phase snow geese, and also few hybrids Canada x (Blue phase?) Snow goose show this feature.
meanwhile , I stumbled over this:
http://waarneming.nl/soort.php?id=7739&wno...um_tm=&tab=foto (http://waarneming.nl/soort.php?id=7739&wno_datum_van=&wno_datum_tm=&tab=foto)
I thought there is not much doubt about the ID? At least it isn´t to me.
The person who sighted it, doesn't respond very quickly to his e-mail, so probably that's the reason. I've now tried it through a different way and hope he'll respond. It's a rare hybrid, I think it's even the first for the Waarneming.nl database.