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Figure 2

Figure 2


Fig. 2. Various stages of the wing and foot stoke cycle illustrated from 1/30th of a second video frames of common eiders during descent, from four different angles (rows). Each stroke cycle illustrated was 0.43 s and so frame numbers from 1 to 13 are used to describe the various stages of the stroke cycle in the text, and correspond with stoke cycle stages indicated in Fig. 3.