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Ring-bill May 19, I Walking along Lake Shore 11:05 am. Ring-bills very numerous. Clear. Windless. Unbelievably hot. Most birds inactive. [[right margin]]four vertical lines & cross hatched area [[/right margin]] One bird, however, circles above me repeatedly. Flying circular, up and down, deep wing-beats (not as deep and buoyant as the one earlier case cited May 17). Giving Alc most of time. Then, when flying downward, these notes became lengthened into a series of high shrill screams: "keh keh keh keh [[right arrow]] kreeree [[right arrow]] keees-keee-keeee...." sort of business. Bird gives up quickly, flies off. [[right margin]]four vertical lines & cross hatched area [[/right margin]] 11:20 Come across group of birds, put them up. Lots circle with Alc. One circles with Alc; once or twice suddenly accelerates, deep wing beats, flies downward, call changes to "Kreeeee-keeeee-keeeeee", high pitched, penetrating, pure [[town?]] Then stops calling, flies upward with a short, shallow, Soar, (apparently quite unritualized). Repeats performance twice. This bird definitely in complete adult plumage. [[right margin]]four vertical lines & cross hatched area [[/right margin]] Then another bird repeats performance, exactly the same except that it flies upward after swoop with ordinary wing-beats. May 20, 1955 Lake Front 6:15. Further notes on the Swoop-Soar performance. [[margin]]Four vertical lines and a hatched vertical line [[/margin]] Have seen gull continue "Kreeeee" call during Soar. Also have seen gliding swoop with "Kreeeee" Call. [[margin]]Four vertical lines and a hatched vertical line [[/right margin]] Note: this "Kreeeee" call must be the equivalent (i.e. exact homologue) of the aerial PCC of Franklin's. But it is quite unlike the call I have been terming PCC on the ground In other words, the aerial PCC and the "ground PCC" of the Ring-bill are much more