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Humphreys, Elizabeth M.; Wanless, Sarah; Bryant, David M.. 2006 Stage-dependent foraging in breeding black-legged kittiwakes Rissa tridactyla: distinguishing behavioural responses to intrinsic and extrinsic factors. Journal of Avian Biology, 37. 436-446. https://doi.org/10.1111/j.2006.0908-8857.03594.x