Long-distance migration can take over three generations of butterflies to complete. Many butterflies do not migrate at all, but stay in the same region their entire lives. No one knows how butterflies find their way during migrations. Butterflies are tagged in order to learn more about how, when, and where they migrate. Antennae are used for the sense of smell and balance.
Butterflies have two segmented antennae with a small club at the end of each.
A club is the thickened end of a butterfly's antenna . The proboscis uncoils to sip food, and coils up again into a spiral when not in use. The lepidopteran with the longest proboscis is the hawk moth. Palps are the mustache-like scaly mouthparts of adult butterflies that are on each side of the proboscis . These palps are covered with sensory hairs and scales, and test whether something is food or not.