Canada hybrid.

An interesting Canada goose hybrid at a pond. The mate is a normal Canada.
I've seen lots of odd mallard hybrids, but never a C goose. Per the Net, though, it's pretty common.

Sandy

Looks like someone spilled bleach on him/her. I've seen a couple of odd hybrids of other goose species over the years. This is one of the less attractive blends....

The lack of documented hybrids of the Canada goose suggests that this is more likely an example of a "piebald" ( local leukism) mutation. The genes that determine the color of a feather's entire or patterned color regulate the production and/or the deposition of the appropriate melanins in the rachis, barb, and barbule keratin at the time of it's differentiation at the epidermal collar within the base of each feather follicle. The feather, and the follicle from which it grows, is one of the most functionally and structurally complex, wondrous structures in the animal kingdom

Dave Graham, Estelline, SD

...and before the comparative anatomists and developmental biologistS start to pile on my last comment, yeah, the eye and brain are fairly remarkeble as well.

Dave Graham, Estelline, SD