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[[underline]] dominicanus [[/underline]]

January 3 & 5, 1956, Gente Grande and Porvenir

[[margin]] 3 vertical lines and vertical crosshatch pattern [[/margin]] Notes on the aerial L.C. performance, which I have seen repeatedly in the birds flying above the hen house at Gente Grande and the birds flying along the coast near Porvenir. The "HD" phase is usually (always?) short, (and not always accompanied by the HD posture - apparently); while the "O" phase is often very long (6-9 syllables) Can confirm that the aerial O posture is much less extreme than that of the Herring Gull. Postures almost horizontal.
Also, sometimes at least, the belly looks particularly plump in the aerial O. [[image - bird profile with open beak]]  aerial O

[[margin]] vertical crosshatch pattern [[/margin]] This species looks long-winged in the air. This appearance to due to length of the arm - not that of the hand & primaries

[[margin]] 3 vertical lines and vertical crosshatch pattern [[/margin]] Noticed about 3 juvenile Kelp Gulls feeding with the Dolphin Gulls by the centolla factory. Just feeding, most of the time; but they occasionally gave T note (usual large [[underline]] Larus [[/underline]] "Klioo" type, quite high pitched & "pure" in sound), usually with slight trace of T movement; from feeding posture, or relaxed posture, or even H (more or less). This did [underline]] not [[/underline]] seem to be FB. Not directed toward adult Kelp Gulls. Never repeated as FB T so often is, certainly not accompanied by any FB pecking movements toward bill of bird toward whom the display was directed. These single T notes, in fact, were very reminiscent of the T's of Scoresby's Gulls. I think they must have been hostile reactions; provoked by too close approach of other birds, other Kelp Gulls and Scorseby's Gulls. This is of some comparative interest.

[[margin]] vertical line and vertical crosshatch pattern [[/margin]] Must again stress how polysyllablic is the L.C. performance on the ground. Frequently the O contains up to 10 notes - sometimes more. It is certainly my impression - although nothing more, that this is more polysyllabic more often than the L.C.'s of any other species I have studied.

[[margin]] 3 vertical lines and vertical crosshatch pattern [[/margin]] Two M notes (bill opening very widely, and closing again between notes) from extreme, moderately agg.V, in obvious hostile dispute. (This is rather un-