Right you are though the dark one is a Blue goose (blue color phase of snow geese). While "blues" are a common bird in the central flyway they are extremely rare in western Washington. Recently a small handful (2 or 3 a year) are seen mixed in with the large flocks of snows wintering at the mouth of the Skagit (out of as many as 100,000 birds).
That blue is the first that I had ever seen and while I'm sure others had been taken I have never heard of one. To have the bird being banded makes it doublely rare - maybe a one in a million.
Send the info in but the data had not been entered from this year's banding efforts so will have to wait for a well to see where it was banded.
Our snows come from Wrangle Island (Russia Siberia). The banded snows I or my partners have shot in the past have all had the same prefix number and were from Wrangle. The blue had a different prefix so we are guessing that it may not be a Wrangle bird. Maybe for Alaska's north slope or the Canadian artic. Regardless the information will be interesting.