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Fig. 2. An example of dives (black line), dorso-ventral acceleration (green line)
and pitch angle (grey line) of a shag (03F4) during a foraging trip between
two landings. Periods ashore in the colony, in flight and in dive bouts are
indicated as grey, orange and blue bars at the top, respectively. Values on
the orange bars are dominant stroke frequencies (Hz), and values in
parentheses are estimated body masses (kg).