Fig. 6. Dummy paths in retinal coordinates as they would have been seen by the crabs. The paths (grey dots) are shown from the moment the dummies became visible in the recording area until the crabs reacted (black dots). Paths are selected in A-C according to the retinal elevation of the burrow entrance (large grey circles) at the start of each experiment, which is a function of crab-burrow distance and eye height above ground: (A) -20° to -7°, (B) -7° to -5° and (C) -5° to 0°. The lower the burrow is seen in the visual field, the closer a crab was to its burrow.

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