Fig. 5. (A–E) The same as in Fig. 2, but using patterned shapes placed in front of a patterned background, thus presenting the bees with motion contrast, rather than with luminance contrast. Black columns, Megachile rotundata; hatched columns, Apis mellifera. Asterisks denote the level of significance against random-choice expectation (CF=50 %, dashed lines) (²-tests). ***P<0.001; **P<0.025; *P<0.05. NS, not significance. Numbers above columns denote the total number of choices.

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