One of my resolutions for the year was to further establish habitat for the birds in our yard. We installed two bluebird boxes, which I picked up from my local State Employees Credit Union. The box on the blackberry trellis was quickly found by a pair of Eastern Bluebirds, and after a brief kerfuffle with a Brown-headed Nuthatch, they soon made the box home and laid five perfect, light blue eggs. The second box appears to be inhabited by House Wrens,…