Hi folks, 
Amy and I took a drive towards Prairie via Hwy 20 on Saturday. We stopped for about 30 minutes at a point on the west side of the road about 2 miles in from the beginning from where it leaves Hwy 20  at Mile 111. There we saw a flyover of at least 50 Mountain Bluebirds, presumably a migrating flock. Most of the time could see about 7-8 at once, but on one occasion at least this many flew over our heads, They were flying around and settling on rocks and on small shrubs, occasionally flying out to catch airborne insects. Looked to see if any Westerns mixed in, but all appeared to be Mountain as far as I could see. eBird flagged it as a high count, but I wonder at this time of year?
John Shortis.