Antenna
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<speciesfyi-glossary slug="antenna"></speciesfyi-glossary>Definition
A paired sensory appendage on the head of insects used to detect chemicals, air currents, and vibrations.
Detailed Explanation
Insect antennae are remarkably sensitive — a male silk moth detects individual molecules of female sex pheromone over kilometers. Antenna morphology reflects function: feathery (plumose) antennae maximize surface area for scent detection; club-shaped antennae in butterflies are adapted for chemical taste. Antennae also detect mechanical vibrations (substrate-borne sound), humidity, and temperature, making them multimodal sensory organs.