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Figure 1: Consecutive visits to flowers by marked Ceratina flavipes in late June 2000 at the study quadrat. Ishikari study site. Each alphabet indicate flowering species, A: Rosa rugosa; B: Rosa parvifolius; C: Picris hieracioides v. glabrescens; D: Lathyrus japonicus; E: Calystegia soldanella. And each marks indicated the behaviors, =: Moving within same stem; -: Moving to another stem. Bord face letter indicates collection of pollen, underline indicates staying at central of flower witout collecting pollen, and standard face letter indicates landing on the flower petals.