They look like they have some Greater White-Fronted Goose in them, based on the white at the base of the bill, the head shape, and the black on the neck not extending as far down as on the standard issue Canadas.
I'm pulling this entirely out of the blue and my experience, but the heads remind me a LOT of Barnacle Geese. There's a lot more white to the cheeks than typical on a pure Canada there and I wouldn't refute the Greater White-fronted hypothesis, it just doesn't explain extra white on the cheeks/neck.
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They look like they have some Greater White-Fronted Goose in them, based on the white at the base of the bill, the head shape, and the black on the neck not extending as far down as on the standard issue Canadas.
I'm pulling this entirely out of the blue and my experience, but the heads remind me a LOT of Barnacle Geese. There's a lot more white to the cheeks than typical on a pure Canada there and I wouldn't refute the Greater White-fronted hypothesis, it just doesn't explain extra white on the cheeks/neck.
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