Eastern Bluebirds and interesting woodpeckers

During my walk today on the Canon City Riverwalk I found a nice mixed flock consisting of a male and a female Downy Woodpecker, a male Hairy Woodpecker, a White-breasted Nuthatch and 3 Eastern Bluebirds (an unusual species this far west in Colorado).

Interestingly, a male and a female Eastern Bluebird appeared to be checking out some holes a trees near the river. It would certainly be cool, and rare, to have them nest this far west(though there have been documented breeding in Boulder Co).

Also interesting were that both the female Downy Woodpecker and the male Hairy Woodpecker had distal brownish primaries. I have seen Downy Woodpeckers with these brownish feathers before and have been told that woodpeckers with these brown feathers are sometimes seen here.
SeEtta