Abstract An individual honey bee performed 135 times reversal learning by flight approaches to blue or yellow colour (1st–;18th August 1973; 1094 visits to the experimental arrangement). The bees ability for reversal learning was maintained during the whole time with only some temporary disturbances. Beginning with the arrival of the bee its choice tendency was measured by counting the actual landings. After 4 minutes honey-water was offered on that colour which was to be learned. The learning performance was considered successful if in three successive tests the bee chose the right colour at least on 75% of occasions. The learning periods consisted of 3 to 48 visits; most frequently they consisted of 5 visits (27% of all learning periods). After approximately 6 reversal tasks difficulties in reversal learning were encountered. In such cases a larger number of visits was necessary for the reversal learning. Such difficulties in reversal learning became less frequent and less pronounced with time.