In a pattern discrimination task, bees tend to fly along the contours
contained in the patterns, as revealed by an earlier study. As opposed
to this, in a task involving the detection of an edge between two str
iped surfaces placed at two different ranges, the bees avoid contour-f
ollowing, as revealed by the present study. The study shows that, in t
he latter task, the bees learn to suppress the otherwise innate contou
r-following behaviour and adopt a flight strategy that provides them w
ith the motion parallax cues necessary to cope with this task. Thus, t
he animal's active behaviour determines the type of visual information
to be extracted from the environment.