I was treated to my most memorable nighthawk spectacle ever at Campbell Flats this evening. Numbers of birds (98, a conservative count) pale against those Don Clark and others have tallied at Westminster Station, but I had prolonged, close views of dozens of birds hawking insects over the unmowed fields. Arriving at 6:30 pm, I immediately had a large group of birds moving erratically overhead towards the Connecticut River, while another 12-15 bounced, swerved and dipped over the fields in fading sunlight, sometimes just a few feet over my head. The peak activity occurred between 6:35-6:50, but 1-4 birds continued their insect-catching aerobatics until 7:10, after all others had vanished. At one point ~6:45 pm, I scanned the western horizon and could see nighthawks in every direction, at elevations up to 500 feet.