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, and the box is filled up past the hole with twigs, so I have not been able to monitor it like I have the Bluebirds. Bluebird box on the blackberry…