So, I caught a small wing of these guys along the Columbia River, near Chinook WA over the 4th of July week. There are small differences in plummage, bills and leg coloring that are confusing me; I'm not 100% certain a) What they are and b) If they're all, even,, the same species.
My initial guess is Western Sandpipers...but, I'm fairly lost.
IMAGE LINK: https://flic.kr/p/29J3HqT sandpiper-9805 by Eric, on Flickr
IMAGE LINK: https://flic.kr/p/28CL217 sandpiper-9780 by Eric, on Flickr