Hello Caitlin - You can look for recent sightings of particular species
at http://birdingwashington.info/dashboard/

It shows four sightings within the last two weeks of Black-backed
Woodpecker: one at Bethel Ridge, one at White Pass, one at Government
Meadows (King County) and one at Loup Loup Campground.

It shows four sightings also of American Three-toed Woodpecker. They are
somewhat far-flung: Husum highlands, Salmo Pass, north of the Mount
Baker Highway in Whatcom County, and at Clover Flat Campground on the
Middle Fork of Ahtanum.

Good luck tracking these down!

Jane Hadley
Seattle, WA