White Goose?

Here's an interesting challenge for those of you out there who thrive on this stuff! If you don't thrive on it but you'd like to put your 2¢ in, you'll have fun too!

Here is a white goose that Jeff & I saw this morning at North Point Marina. It was initially flying around with two Canada Geese then after landing on the water, took off again on its own heading south along the beach.

Here's the Adobe PDF link: http://www.birdsillinois.com/slideshow/Goose shots.pdf. There are nine shots in the PDF file.

Rather than add any other thoughts or sightings to this post (we did see this bird on the water through my scope), please let us know what you think based on the photos (I'm trying hard not to lead to any conclusion!). The two possibilities are Snow Goose and Ross's Goose (or hybrid of one or the other).