A proboscis is a projection or elongated appendage at the front of the face. In vertebrates, the term is used to describe an elongated nose or snout. In invertebrates, the term usually refers to tubular mouthparts used for feeding and sucking.
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Butterflies have two antennae, two compound eyes, and a proboscis.
A syrphid fly using its proboscis to reach the nectar of a flower
An aardvark with a proboscis