A song sparrow in sea grass

Shortly after I shot the crows chasing the juvenile bald eagle, on the drive home, I stopped at an old dock. I clearly could hear a bird, probably a sparrow, but wasn’t sure where it was. It was low tide and then I spotted the bird in a small “cave” created in the sea grass when the tide went out.

It’s a large song sparrow. The blue/grey tones are what I was with my eyes and the images are correctly white balanced. It may be the large, grey Alaska variant of the song sparrow which are more common farther north than the north coast of British Columbia, but the expert opinion I consulted was divided, with some saying it was the “merilli/montana”  subspecies that is also found in the BC and US interior.  Problem is that in most, there is a lot more brown than grey.