Here are a few other nests -
As you know, we love to photograph birds. So to attrach them, we actually build several bird houses that have revovable lids. Then we check them from time to time to see progress. We have to leave the birds alone about 15 days after hatching (so they don't fledge early). So, they are normally protected (roof on), we just remove the roof to get a few pictures.
These are other nests - unfortunatly, we are now in Alaska for a few weeks to photograph grizzlies - so the babies will be grown before we get home. ; (