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[[underline]] dominicanus, [[\underline]] Dec. 30, 1955, II. [[circle]] 220 [[\circle]]

Have seen quite a few more cases of aerial L.C.'s by adults today. Usually birds flying over me; and obviously disturbed. Can definitely state that the wings continue beating throughout most (and probably all) aerial L.C.'s. One interesting case. Adult bird, with food in bill, was pursued by another adult bird. Very rapid, prolonged pursuit. The pursued bird uttered 2 or 3 or 4 complete L.C.'s during the chase; [[underline]] none [[\underline]] of which was accompanied by ritualized postures.

A note about pursuit flights. I have seen quite a number of them in the course of the last few days. Much rapid twisting & turning. Possibly a few short, shallow, obviously unritualized, swoops with beating wings. A few short, shallow, obviously unritualized, soars with beating wings and "gliding" soars. 
All patterns by adults in complete nuptial plumage, unless otherwise noted.

December 30, 1955, Porvenir Bay
[[underline]]  maculipennis [[\underline]]

Have seen several more cases of M.C.'s of O -> F -> V & HF

Have also seen several cases of O -> F by birds on ground toward flying birds. Just like B.h.G.

This species also has a definite ritualized Swoop-Soar complex. Have seen several forms. Once, a bird chased a Skua in air, made repeated, [[underline]] very long, [[\underline]] gently sloping, Swoops (flying) and Soars (both flying and gliding) at the Skua. These were almost as extreme as the most exaggerated Swoops and Soars of the B.h.G. [[image - diagram suggesting swoop]] toward skua

Also some interesting behavior toward me. Quite a number of birds, flying by along the shoreline, have stopped to circle me. Have uttered usual aerial LCN's, AlC's, and, also, many particularly long LCN's, slightly quavering, almost "Kee-a-waar" notes.  There are probably PCC notes. Sometimes, at least, accompan-