Researchers from the School of Biological and Chemical Sciences at Queen Mary University of London, taught bumblebees to distinguish between two visually clearly different feeder types, one type containing food while the other did not. They found that bees were able to quickly learn the feeder types containing food when the feeders were arranged horizontally. However, the bees failed to distinguish these feeder types when these were distributed vertically on a wall and significantly more often chose the wrong feeder type.