Antenna (biology)

An antenna is one of a pair of appendages used for sensing in arthropods and onychophorans. Antennae are sometimes referred to as feelers. Often for touch or feel, locate food from distance, some insects such as male mosquitoes even have hairy antennae to hear even a little sound from the female's buzz.

Antennae are one of the important parts of insects.
Arachnids do not have antennae.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

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