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[[underline]] scoresbii [[/underline]], Dec 29, 1955, VI.

General conclusions about comparative significance. The L.C. behavior of this species definitely puts it into the large [[underline]] Larus [[/underline]] group. Morphological features would suggest that its closest relative is Belcher's Gull. Some aspects of its behavior (i.e. the hostile T patterns) are somewhat reminiscent of the hooded gulls; and it may be that this is the closest thing there is to an "intermediate" species between the two main groups of gulls.

General notes about the physical appearance of the species. It looks like a short, small version of the large Larus species. Almost like a large pigeon with a coarse bill. (This bill is thick & short, but much less massive looking than I expected. Less massive-looking than I expected). The bird appears to be somewhat shortnecked. Doesn't convey the impression of short compact body like Belcher's Gull; but doesn't look at all long-necked either. Rather nondescript; in fact; and not very attractive proportions.

December 28&29, 1955
[[underline]]dominicanus[[/underline]] Calleta Josefina and Porvenir Bay

Notes on some aerial behavior by birds put up by me. Complete aerial L.C's are [[underline]]common[[/underline]] in these circumstances. Haven't been able to see the accompanying postures in most cases; but in one case at least the aerial L.C. was accompanied by [[underline]]both[[/underline]] HD and O postures. The HD posture was less extreme than my drawing of the aerial HD of the Herring Gull - more like my drawing of the areal M of the Herring Gull. [[arrow]]

[[underline]]maculipennis[[/underline]] December 29, 1955, Porvenir Bay.

Have seen some pairing behaviour!!! [[male symbol]] vented by 2 females in a row. (Second [[female symbol]] approached on foot. I didn't see the approach of the