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Several social bee species of the family Apidae use scent marks on flowers left by previous visitors to improve foraging efficiency, but scent marking has not been demonstrated in other social bees. Experiments were conducted to confirm the ability of the eusocial sweat bee Halictus (Seladonia) aerarius (Hymenoptera: Halictidae) to use scent marks to detect flowers within 3 min of foraging by the...
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