Fig 2. Video tracking of bees using a vertical arena.

A, Examples of paths followed during 3 minutes by four individual young bees (day 1 after emergence). B, Superimposed paths followed by eighty individual bees. Overall, arena sides were more frequently visited. C, Locomotor ability measured at day 1, 2 and 6 after emergence (bees kept in an incubator). Mean distance (± S.E.M) covered by bees slightly increased from 3.2 to 3.8 meters between day 1 and 2 (p<0.01, n = 138 and 63 respectively) and did not significantly further increase as shown at 6 days after emergence (n = 38).