Figure 4.

(a) Paths of ants on release platforms 10 m from the nest (top row) and 15 m from the nest (bottom row). Black lines, zero-vector ants; red lines, full-vector ants. Nest direction is indicated by black arrow, the direction of the path integration vector (for red paths) is indicated by red arrows. (b) Gaze directions of ants on release platforms. Column 1: normalized frequency histograms of gaze directions relative to the true home direction at 0° of zero-vector ants released at 10 m (top) and at 15 m (bottom) from the nest, when walking slower than 5 cm s⁻¹ (black lines) and faster than 5 cm s⁻¹ (blue filled areas). Columns 2–4: same for full-vector ants, with the direction supplied by the path integrator indicated by red arrows. n indicates the number of releases at the different release stations.