Which mouthpart is characteristic of insects like butterflies for feeding?

The mouthpart characterized by insects like butterflies for feeding is the proboscis. This specialized tubular structure allows butterflies and moths to feed on nectar by extending it into flowers. The proboscis is often coiled when not in use, allowing for easy transport and feeding efficiency.

In contrast, palps are sensory appendages that help insects manipulate food and sense their environment but are not primarily used for feeding as a proboscis is. Chelate mouthparts are typically found in some predatory or scavenging insects, functioning differently than the feeding mechanism seen in butterflies. Mandibles are strong, jaw-like structures used for biting and chewing, common in many other insects but not in those like butterflies that feed primarily on liquid substances like nectar.