Insect antennae are sensory organs located on the head of insects. They are primarily used for detecting smells, tastes, and environmental changes. Antennae can vary in shape and size, depending on the species, and are crucial for communication and navigation. These structures are made up of segments, allowing for flexibility and movement. Insects like butterflies and bees have highly developed antennae that help them locate food and mates. The information gathered by antennae plays a vital role in an insect's survival and behavior.