As an expert in entomology, I can tell you that butterflies possess a unique type of mouth called a proboscis. This is a long, coiled, straw-like structure that they extend when they need to feed on nectar from flowers. When not in use, the proboscis is coiled up under the butterfly's head like a watch spring. When a butterfly lands on a flower and starts to feed, it uncoils its proboscis and inserts it into the flower to reach the nectar.

Butterflies use their proboscis by first locating a suitable flower and then using their legs to grip the flower. They then extend their proboscis and use it to draw up the nectar through a series of tubes and channels that lead to the butterfly's stomach. The proboscis is a highly specialized organ that allows butterflies to feed efficiently on flowers.

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Well, instead of a mouth, they have a kind of long, straw-like structure called a 'proboscis' which enables them to drink juices and nectar. When this 'proboscis' is not being used, it is coiled-up like a garden hose. Butterflies feed primarily on nectar from flowers.read more >>