There are many insects, which have straws for sucking up the liquids. The insects, which have straws, are moths and butterflies. In the figure, an insect is sucking blood.
A Mosquito Sucking
Insects have suck up liquids have mouths shaped like long tubes. Insects that suck include aphids, which have a sharp tube for piercing the stems of plants ad sucking out sap. Mosquitoes pierce our skin to suck up the blood. A housefly has a tube with a sponge-like organ at the end for sucking up liquid.
In biological language, these straws are called a proboscis. Insects that drink nectar form flowers have the best straws. A butterfly normally keeps its long proboscis coiled up, only extending it when it intends to use it. The convolvulus hawk moth has a straw 14 centimeters long for reaching deep into certain kinds of flower. One type of South American moth has a proboscis that is 30 centimeters long.
