The film shows an experimental setup for differential conditioning of honeybees to odours. Classical conditioning of the honeybees is demonstrated; the proboscis reflex behaviour is shown in close-ups. A trick-film part demonstrates the neurobiological basis of the conditioning process. The odour receptors on the antennae of the bee are shown and the brainstructures are described. Learning and memory are compared for the experimental bees and for bees in the field under natural conditions.