Johnston 1948. Field Notes Aug. been voicing their crying so that scarcely a moment goes by that their crying is not heard. The flock has not moved as a body for about an hour - Occasionally members will come and go. There have been two large flocks of Bonaparte Gulls, one near the bay end of Radium Pen. The other near Duck Creek. At intervals of about five minutes these flocks will take to the air and fly sometimes close to the surface - at times at 200-300 feet high. Sometimes the whole flock will swoop & turn in crazy fashion, other time only individuals will go through all sorts of antics, swooping up or down. The Herring Gulls prefer to sit on the higher places of the sand spit - but the Bonaparte Gulls, when they did alight did so close to the waters edge.