Figure 7.

Facing directions of ants trained with a pattern of two abutting triangles. (a)(i)–(c)(i) Three groups of ants; each is trained to a different point (F) on the base of the left-hand triangle. a(ii),b(ii),c(ii)(iii) Facing directions in tests with rectangles. Dashed bars on patterns show the FPM of F when triangles are segmented and FPM is computed over the left-hand triangle (sFPM) or not segmented and computed over both triangles (wFPM). Modal facing directions in a(ii),b(ii) are aligned with sFPM. Modal facing directions in c(ii)(iii) are best predicted by wFPM. a(iii),b(iii) Tests with left-hand edge of rectangle slanted to match left-hand edge of triangle. Facing directions suggests ants are guided by the retinal position of the slanted edge (eLF). (a–c) Adapted from [57].