Mountain Bluebird nest

I must add that the only reason I am lucky enough to have this (macro!) photo of Mountain Bluebird nest with eggs is that I went with Bluebird Monitor, Don Stiles, on his Bluebird route on 22 June 2010. Don has been recording all "his" nesting boxes along certain backroads SW of the city for many, many years. Without this dedicated work by Don and others, the Mountain Bluebird population would have declined - as it is, their numbers are still low. Nests and nestboxes of any species of bird should, of course, never be approached or opened unless one is accompanying a trained nest monitor.