There's quite a story behind these Mountain Bluebird images. Several years ago Tim had befriended a woman who had set up Mountain Bluebird nesting boxes out of the Truckee area. As I recall, it was in excess of 100 boxes. She has fallen ill, so Tim has taken over the duties of maintaining all those boxes, as well as deciding to set up around 70 new ones. Not all boxes are occupied by Bluebirds each year, so you need to check on them to find out which ones have babies in them.