Here's Rob's report when I asked if he'd check the bluebird houses:
The Middle Box; on the corner of the fence, has a nest and four bluebird eggs with a female in attendance. Let's not disturb that one at all from now on.
The one nearest your shed has the start of a bluebird nest.
The one on the top corner (near the lime pile)has a nearly complete nest. On my arrival two beautiful purple martins were sitting on the bex.
Guess what our next bird project is?