For a leisurely, Sunday afternoon stroll, we set out for Mill Pond Park as the sky richly turned to sherbet shades. It was mid-May and we knew the park would be vibrant and reverberating with song. By this time in the season, the red-winged blackbirds, catbirds, and red-breasted woodpeckers had returned, noisy neighbors with whom the many mallards, swans, and geese would contend in the reedy marshes and open water. I spotted a Baltimore Oriole, a rare sight in my experience, and I marked it as a lucky day. Little did I know what I would find a short while later.