Reports of washboarding appear regularly on this forum. Although washboarding is a recognized behaviour there does not seem to be an explanation. In order to try to explain the behaviour, members are asked to post reports of washboarding on this thread. WASHBOARDING....... The worker honey bees, standing on the outside of the hive, rock backwards and forwards. The wings are static. During the forward movement the bees touch the hive surface with their mouths and move the forward pair of legs. A group of washboarding bees face in the same direction. There may be more than one group of bees. DETAILS ..... which may be useful. Time and date. Location of apiary. Temperature and recent weather. Forecast weather. No. of hives affected and total no. of hives on site Nectar flow or dearth. Condition of affected colony(s). Source of bees ---- swarm, package, home bred. Additional factors ---- (and pics). Please send me a PM or post any suggestions for changes.