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Fig. 3. Relationship between downwind approach distance d, and wind
direction. (A) The distribution of wind directions in the desert near
Maharès (bin width 15°, east is at 90°; recording times as in
Fig. 2A; wind directions above
180° were not observed during the present experiments). (B) The
relationship between wind direction and d; values are means ±
1 S.D. (C) Four approaches of an individually marked ant to a
feeding site are superimposed (actual feeder was just 30 mm in diameter; its
location is indicated by a 67 cm circle centred on the feeding site). As
indicated by arrows, wind directions were slightly different from one approach
to the next. The ant's final approaches were always against the wind. The
broken circle centred on the feeder has a radius of 1.75 m.
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