White-fronted Goose/Canada Goose Hybrid

[Dove12]

I saw a White-fronted Goose/Canada Goose Hybrid at Casimir Gzowski Park(west of Sunnyside) Aug 13, 2012, about 2pm. I've posted 2 pix on the Ontario Birds board.
David Creelman

[Dove12]

As thouc informs me, my Greater White-fronted/Canada Goose Hybrid, could easily be a Greylag(domestic)/Canada Goose Hybrid. Any comments welcome. Searching around, I'm not seeing too many hybrids with black bill(though variations undoubtedly very numerous). The yellow thick legs were very bright yellow.
David