👉 In biology, a proboscis is a specialized structure that is used for sucking up or passing liquids. It is an organ in animals and plants that is located at the opening of their mouths. Proboscioids are typically found on the stingers of some insects, such as ants, bees, and butterflies. They can also be found on the beaks of birds, especially those with a proboscis-like structure called a "stinger." Proboscioids play important roles in insect