Intercolony variations in movement patterns and foraging behaviors among herring gulls (<i>Larus argentatus</i>) breeding in the eastern Wadden Sea.

3.3 Foraging patterns The geographical position of the breeding colonies had a highly significant effect on the foraging habitat utilized; gulls breeding on the farthest offshore island, Amrum, foraged on the tidal flats five times more often than gulls breeding on Langeness (odds ratio [OR] = 0.2, p < 0.001) and Oland (OR = 0.17, p < 0.001), which were located closer to the mainland (Table 3 ).

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