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Duration of response by (a) herring gulls and (b) great black-backed gulls to various auditory stimuli and a physical approach by a human. Because the majority of responses fell in lower time intervals, latencies above 15 sec have been binned to aid visualization. SOSP = song sparrow, WESJ = western scrub-jay, HERG = herring gull, GBBG = great black-backed gull, BAEA = bald eagle.
