Glossary
One of two segmented sensory appendages on a bee's head that serve as the primary organ for smell, touch, taste, temperature detection, humidity sensing, and even hearing. Antennae are the most important sensory organs in the hive, where darkness makes vision useless.
A honey bee's antenna is not a single-purpose organ. It is a multi-sensor array packed with receptors for smell (over 170 types of olfactory receptors), touch (mechanoreceptors at the tip and along the length), temperature (thermoreceptors that detect changes of less than 0.5 degrees Celsius), humidity (hygroreceptors), taste (gustatory receptors), and even air movement (wind speed and direction). No other body part provides as much environmental information to the bee.
Inside the dark hive, smell is everything. Antennae detect the queen's pheromones, the alarm pheromone released during threats, the colony's chemical identity (used by guard bees to identify nestmates vs. robbers), the ripeness of nectar, the chemical signatures of diseases in brood, and the specific scent of individual flowers that foragers communicate through food-sharing. The 170+ olfactory receptor types allow bees to discriminate between hundreds of different chemical compounds with remarkable specificity.
Bees constantly touch each other with their antennae. This antennal contact transmits chemical information (pheromones on the body surface), identifies colony members, signals food begging (a hungry bee extends her proboscis while touching a food-carrying bee's antenna), and guides behavior during waggle dance following (recruit bees place their antennae against the dancing bee to read the vibrational and chemical cues she produces).
Each antenna has three main segments: the scape (base segment that attaches to the head), the pedicel (a short connecting segment), and the flagellum (the long, multi-segmented portion where most sensory receptors are concentrated). Worker antennae have 12 segments; drone antennae have 13, with additional pheromone receptors that help them detect queen pheromone during mating flights.
Yes. Hygienic workers use their antennae to detect the chemical signatures of diseased or parasitized brood through the cell cap. This ability allows them to identify and remove infected larvae before the disease can spread, a behavior called hygienic behavior that is genetically variable between bee strains.
A bee that loses one antenna can still function, albeit with reduced sensory capability on that side. Loss of both antennae is severely disabling, as the bee loses her primary means of navigating the hive, detecting pheromones, communicating with nestmates, and finding food.
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