...Daniel Heusser; Rüdiger Wehner SUMMARY When negotiating their way through cluttered environments, desert ants, Cataglyphis fortis , tend to run along the midlines of the alleys formed by adjacent low shrubs. This ‘centring response’ was investigated by inducing foraging ants to walk through...

.... In either case, the ants define their courses within allocentric systems of reference. Here, we show that desert ants, Cataglyphis fortis , forced to run along a devious path can use egocentric information as well. The ants were trained to deviate from their straight homebound course by a wide inconspicuous...