Up on Hawthorn Hill Wondering where have all the bluebirds gone Ever since we moved into our house on the hill, there have been recurring natural patterns that have enriched our lives. One of those is the annual return of at least one pair of bluebirds. Some summers we have been lucky enough to share the place with two nesting pairs. If my notes are accurate (trusting notes more than memory these days!) normal bluebird behavior is to hang out…