The last couple of years I haven't had any
bluebirds in my
bluebird house outside my dining room window. A little red squirrel had chewed the entrance hole too wide. The
bluebirds attempted a second nesting both years but were evicted by the wrens!
I finally got around to cutting a piece of flashing to put over the hole, but it was too late for the
bluebirds. However, I now have a pair of
tree swallows building a nest in the
bluebird box. I'd heard treeswallows would use
bluebird boxes, but had never seen any before.
Now I'll just put up another
bluebird box to see if I can entice the
bluebirds to use it for their second nesting. I'll try to get a wren guard installed over the hole first.