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Examples of foraging paths frequented by individual bumble-bees in the solo foraging experiment (data from Ohashi et al., 2007). Arrows indicate how often and to which direction each bee moved between two flowers. Black arrows indicate significantly asymmetrical transitions (P < 0·05). Thick and thin arrows indicate frequent (>5 % of total) and infrequent (≤5 % of total) transitions, respectively. White double-headed arrows indicate frequent transitions without significant asymmetry.
