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Fig. 5. Ethogram of gap-crossing behaviour; elements of behaviour used in the flow
chart diagram (Fig. 10) are
printed red. Ant, antenna; FL, front leg; ML, middle leg; HL, hind leg; fbr_1,
first footbridge; fbr_2, second footbridge; norm, normal walking step; AEP,
anterior extreme position; fAEP, fictive anterior extreme position; swing,
initial swing movement; search, subsequent searching movement.