Each body segment is specialized into functions such as securing food, locomotion and reproduction. The head contains the antennae and mouthparts. Eyes are either simple or compound. Antennae are used for smelling and feeling. Mouthparts are for either sucking or chewing.
Mouthparts are the most variable of all insect characteristics.
They are often used to determine the type of control measures that will be the most effective for a particular insect. The thorax is the locomotion segment of an insect. It contains the wings and legs. An insect may have no wings, one pair of wings or two pair of wings. The thorax also has 3 pairs of legs.